Kirsty Larcombe Kirsty Larcombe

The Stress-Nutrition Connection: Why What You Eat Matters More Than You Think

We talk a lot about stress. We know it affects our sleep, our mood, our relationships, and our ability to respond calmly when someone loads the dishwasher wrong again. But one piece of the puzzle that rarely gets the attention it deserves is the direct, two-way relationship between stress and what we eat.

Because it turns out, what you eat doesn't just affect your waistline. It affects how wired you feel at 10pm, how quickly you recover after a hard day, and whether your body can actually return to calm once the chaos has passed. And the good news is, you don't need to overhaul everything to start noticing a difference.

Published by Future You Nutrition | futureyounutrition.uk

We talk a lot about stress. We know it affects our sleep, our mood, our relationships, and our ability to respond calmly when someone loads the dishwasher wrong again. But one piece of the puzzle that rarely gets the attention it deserves is the direct, two-way relationship between stress and what we eat, and how the food on your plate can either make your stress response worse or genuinely help to ease it.

This isn't about quick fixes or miracle foods. It's about understanding what's actually happening in your body when you're under pressure, and why nutrition is one of the most powerful levers you have.

What Stress Actually Does to Your Body

When you experience stress, whether that's a looming deadline, a difficult conversation, or the particular joy of running late while also not being able to find your keys, your body activates its fight-or-flight response. Your adrenal glands release cortisol, your primary stress hormone, which floods the body with glucose for immediate energy, ramps up your heart rate, and temporarily shuts down systems it considers non-essential in that moment: digestion, immune function, repair.

In the short term, this is exactly what it's designed to do. The problem is that most people today are living in a state of low-grade, chronic stress, and cortisol was never meant to stay elevated. When it does, the downstream effects are wide-reaching. Research shows that chronically raised cortisol can disrupt metabolism, impair immune function, disturb sleep, affect mood, and increase the risk of longer-term health conditions.

What's less well known is that inflammation and cortisol have a reinforcing relationship. Raised cortisol can increase inflammation, and inflammation can in turn raise cortisol. This is one of the key reasons that diet matters so much, because what you eat either feeds that cycle or helps to interrupt it.

The Two-Way Street

The relationship between stress and nutrition doesn't just run one way, and this is where it gets genuinely interesting.

Stress affects how you eat. When cortisol is elevated, many people find themselves reaching for quick sources of sugar and fat. Not out of weakness, but because the body is literally signalling for fast fuel. (Your body is not trying to sabotage you. It just hasn't caught up with the fact that the threat is a passive-aggressive email rather than an actual bear.) Comfort foods temporarily raise dopamine and serotonin, which creates a short-lived sense of relief. Recognising this pattern is the first step to changing it.

But what you eat also affects how you respond to stress. A diet high in processed foods, refined sugars, and ultra-processed ingredients creates a baseline of inflammation that makes your stress response more reactive and harder to recover from. Conversely, a nutrient-dense, anti-inflammatory diet can help modulate cortisol levels and support your nervous system's ability to return to calm.

The two are intertwined, which means that improving your nutrition isn't just good for your physical health. It's a genuine tool for stress resilience.

Key Nutrients That Support Your Stress Response

You don't need to overhaul your entire diet overnight. But there are some specific areas worth paying attention to.

Magnesium is one of the most important minerals for stress regulation, and also one of the most commonly depleted, both by stress itself and by a diet high in processed foods. It plays a direct role in calming the nervous system and supporting sleep quality. Good sources include dark leafy greens, pumpkin seeds, dark chocolate, and legumes. Yes, dark chocolate counts. You're welcome.

B vitamins are essential for energy production and the synthesis of neurotransmitters like serotonin and dopamine. Chronic stress depletes them rapidly. Found in wholegrains, eggs, meat, fish, and leafy greens.

Omega-3 fatty acids are well established for their anti-inflammatory properties and their role in brain health and mood regulation. Oily fish, walnuts, flaxseed, and chia seeds are all good sources.

Vitamin C is used by the adrenal glands directly in the production of cortisol, meaning your requirements actually go up under stress. Peppers, kiwi, citrus, broccoli, and strawberries are all rich sources.

Protein matters more under stress than many people realise. Amino acids are the building blocks of neurotransmitters, and without adequate protein, your body simply doesn't have the raw materials it needs to regulate mood and energy effectively.

Gut-supporting foods are increasingly recognised as part of the picture too. The gut-brain connection is real and well-documented, and a healthy microbiome plays a meaningful role in mood regulation and stress resilience. Fermented foods, fibre-rich vegetables, and prebiotic foods all contribute here. Basically, your gut has opinions about how you feel, and it helps to keep it onside.

What to Reduce

Equally important is being honest about what can make things worse.

Caffeine, in excess, stimulates the release of cortisol and adrenaline. Useful in moderation, but counterproductive if you're already running on stress and your fourth coffee is starting to feel less like a treat and more like a coping mechanism. Ultra-processed foods and refined sugars create blood sugar spikes and crashes that keep your stress response activated. Alcohol, while it may feel relaxing in the moment, disrupts sleep architecture and depletes the very nutrients your body needs to recover from stress.

None of this is about perfection. It's about pattern. Small, consistent shifts tend to make a far greater difference than dramatic overhauls that don't last.

Why Individual Variation Matters

One of the most important things to understand about the stress-nutrition connection is that it's highly individual. The nutrients that are most depleted, the patterns most worth addressing, and the underlying drivers keeping your stress response activated vary enormously from person to person.

Someone dealing with long-term workplace stress has different needs to someone navigating hormonal changes, caring responsibilities, or a period of poor sleep. A one-size-fits-all approach rarely gets to the root of what's going on, which is why so many people feel like they're doing "all the right things" and still not feeling better.

This is exactly why personalised nutrition support can make such a meaningful difference. Rather than following generic advice, it's about understanding your own picture, the symptoms, the patterns, the underlying drivers, and working with that to build a way of eating that genuinely supports you.

A Starting Point

If you take one thing from this, let it be this: what you eat is not separate from how you feel. Your body is an interconnected system, and food is one of the most direct ways you can influence how it functions, including how well it copes with the demands placed on it every day.

You don't need to be eating perfectly to start noticing a difference. Often the most impactful changes are the simplest ones, done consistently. Progress over perfection, every time.

Ready to Find Out What Your Body Actually Needs?

If you're curious about how nutrition could be supporting your stress resilience, or if you've been feeling like something's just a bit off and you're not sure where to start, I'd love to chat.

I offer free nutrition taster sessions where we can explore what's going on for you and whether personalised nutrition support might be the right next step. No hard sell, just a proper conversation.

[Book a free taster session at free 20-minute taster session]

Kirsty | Future You Nutrition Personalised nutrition and lifestyle support, helping you become the person you want to be.

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Kirsty Larcombe Kirsty Larcombe

Perimenopause Doesn't Have to Feel Like Falling Apart. Here's How Nutrition Can Change Everything

You're doing everything right and yet something has shifted. Your sleep is off, your jeans seem to have shrunk, and your brain has apparently taken a sabbatical. If your 40s are feeling a little chaotic right now, perimenopause might be why. The good news? What you eat can change a lot more than you think.

By Kirsty Larcombe

You're in your 40s. You're doing everything "right." You're eating reasonably well (most of the time), keeping active, managing a full and frankly very busy life, and yet something has shifted. Your sleep is all over the place. Your jeans feel tighter even though your diet hasn't changed. Your mood is doing things you didn't sign up for. And brain fog has started showing up at exactly the moments you can least afford it.

Sound familiar?

If so, you're likely in perimenopause, the transitional phase before menopause that can begin as early as your late 30s but most commonly arrives during your 40s, usually without so much as a polite knock at the door. But, contrary to popular belief and the scaremongering fostered on social media this phase is not a downhill slide. It's a turning point. And what you eat during perimenopause can be one of the most powerful tools in your kit.

What Is Perimenopause, Really?

Perimenopause is the years-long transition leading up to menopause (defined as 12 consecutive months without a period). During this time, your oestrogen and progesterone levels fluctuate unpredictably, rising and falling in ways that affect almost every system in your body.

This hormonal rollercoaster is responsible for many of the symptoms women in their 40s experience, including:

  • Irregular periods

  • Hot flushes and night sweats

  • Sleep disruption

  • Weight gain, particularly around the belly

  • Mood changes, anxiety, or low mood

  • Fatigue and low energy

  • Brain fog and difficulty concentrating

  • Reduced libido

  • Joint aches

The good news? Nutrition is one of the most evidence-backed ways to support your body through every single one of these changes. You have more influence here than you probably realise.

Why What You Eat Matters More Than Ever Right Now

Your body is going through a significant hormonal shift and it needs the right building blocks to navigate it well. Rather than thinking of food as something to restrict or feel guilty about, think of it as information you give your body, telling it whether it's safe, nourished, and supported.

Here's what the science shows us about the key nutritional priorities during perimenopause.

1. Protein: Your Secret Weapon Against Muscle Loss and Weight Gain

One of the less talked-about effects of declining oestrogen is muscle loss. And muscle matters enormously for your metabolism, strength, and body composition.

Many women in perimenopause find they gain weight despite eating exactly what they always have. Often this comes down to muscle quietly declining in the background. Less muscle means a slower metabolism, which means the same plate of food that kept you trim at 35 is now doing something rather different at 44.

The straightforward fix is to prioritise protein at every meal. Aim for around 1.2 to 1.6g of protein per kilogram of body weight daily. Good sources include:

  • Eggs

  • Chicken, turkey, and lean meats

  • Oily fish (salmon, mackerel, sardines)

  • Greek yoghurt and cottage cheese

  • Legumes, lentils, and beans

  • Tofu and tempeh

Starting your day with a high-protein breakfast also helps stabilise blood sugar, which brings us neatly to the next section.

2. Blood Sugar Balance: The Key to Mood, Energy, and Weight

Fluctuating oestrogen affects how your body regulates insulin, the hormone that controls blood sugar. This is why many perimenopausal women experience blood sugar spikes and crashes that leave them exhausted, snappy, and hunting through the kitchen cupboards at 3pm for something sweet.

Stable blood sugar means more stable energy, mood, and weight. Here's how to get there:

  • Always pair carbohydrates with protein, fat, or fibre to slow down sugar absorption

  • Eat within an hour of waking to set your metabolic rhythm for the day

  • Reduce ultra-processed foods and refined sugar where you can (not perfectly, just consistently)

  • Don't skip meals because going too long without eating drives cortisol up and blood sugar down, which is a combination that helps nobody

  • Add fibre-rich foods like vegetables, legumes, and whole grains at every meal

  • 10-minutes of excercise after eating, like a brisk walk, air squats, or even dancing around your kitchen will dramitically reduce the post-prandial blood sugar spike

One genuinely simple habit that makes a big difference: start your meals with vegetables and protein before reaching for the carbohydrates. It sounds almost too easy, but it can dramatically reduce blood sugar spikes.

3. Calcium and Vitamin D: Protecting Your Bones for the Long Game

Nobody warned you about this one. Bone loss accelerates significantly during perimenopause because oestrogen plays a critical role in maintaining bone density. As levels drop, women can lose bone faster than at any other point in their lives. The time to take care of your bones is right now, not after a fracture or a worrying scan result.

Calcium-rich foods to work in regularly:

  • Dairy products (milk, cheese, yoghurt)- if you tolerate dairy

  • Tinned sardines and salmon (eat the bones, they won't hurt you, they're soft)

  • Leafy greens like kale, broccoli, and bok choy

  • Almonds and sesame seeds (tahini on everything is a perfectly valid strategy)

Vitamin D is equally important because it helps your body absorb calcium. Living in the UK means sunlight alone won't cut it for most of the year, because of course it won't. A daily supplement of 1000 to 2000 IU is widely recommended, but getting your levels tested through your GP or nutritionist first is the smartest move.

4. Phytoestrogens: Nature's Gentle Hormonal Support

Phytoestrogens are plant compounds with a mild oestrogen-like effect in the body. Research suggests they may help ease symptoms like hot flushes and support hormone balance during perimenopause. They won't replace oestrogen, but think of them as a friendly background hum of support.

Top sources include:

  • Soy foods such as edamame, tofu, miso, and tempeh (fermented soy is particularly good)

  • Flaxseeds which are one of the richest sources available. Ground flaxseed stirred into smoothies, oats, or yoghurt is an easy daily habit

  • Chickpeas and lentils

  • Sesame seeds

You don't need to go overboard. Consistency is what counts here. One or two servings of phytoestrogen-rich foods a day can make a real difference over time.

5. Omega-3 Fatty Acids: For Your Brain, Mood, and Heart

Heart health risk increases after menopause, which is another reason perimenopause is the time to start paying attention. Omega-3 fatty acids (found in oily fish, walnuts, chia seeds, and flaxseeds) support cardiovascular health, reduce inflammation, and have solid evidence behind them for mood and cognitive function. In other words, they're good for the brain fog and the general sense of not quite feeling like yourself.

Aim for at least two portions of oily fish per week. If fish isn't your thing, a quality omega-3 supplement is a great alternative and arguably more sustainable too.

6. Gut Health: The Connection Nobody Talks About at Dinner

Your gut microbiome plays a role in how oestrogen is processed and recycled in the body through something called the oestrobolome. It sounds like a sci-fi film, but it's real and it matters. A healthy gut helps your body manage oestrogen more effectively. A disrupted gut can tip the hormonal balance in the wrong direction.

To support your gut during perimenopause:

  • Eat a wide variety of plant foods (the target of 30 different plants a week sounds a lot but herbs, spices, and tinned beans all count)

  • Include fermented foods like kefir, live yoghurt, sauerkraut, and kimchi

  • Prioritise prebiotic foods like garlic, onion, leeks, asparagus, oats, and bananas (green tinged ones, not overipe ones)

  • Drink enough water (at least 2 litres)

  • Limit alcohol, which disrupts the microbiome and has a talent for making most perimenopausal symptoms worse

7. Magnesium: The Underrated Mineral Doing Quiet Heroics

Magnesium is involved in over 300 processes in the body and a significant number of women are deficient without knowing it. It plays a particular role in sleep quality, stress regulation, and muscle function, all of which are in disaray in perimenopause.

Magnesium-rich foods:

  • Dark leafy greens like spinach and Swiss chard

  • Pumpkin seeds and sunflower seeds

  • Dark chocolate (yes, genuinely, this is a legitimate nutritional recommendation)

  • Avocado

  • Legumes and whole grains

Many women also do well with a magnesium glycinate or magnesium bisglycinate supplement taken before bed. I

What's Worth Reducing (And No, This Isn't a Ban List)

This isn't about being perfect. It's about knowing what might be quietly making your symptoms harder than they need to be:

  • Alcohol even in moderate amounts can worsen hot flushes, disrupt sleep, and destabilise blood sugar. It's not the most fun message to receive, but it is a consistent one across the research.

  • Caffeine triggers or intensifies hot flushes for some women and can worsen anxiety. It doesn't affect everyone the same way, so it's worth paying attention to your own response.

  • Ultra-processed foods drive inflammation, disrupt blood sugar, and crowd out the nutrients your body actually needs right now.

  • Refined sugar contributes to energy crashes, mood swings, and weight gain. You knew it was coming.

Small, consistent reductions tend to work far better than going cold turkey on everything you enjoy.

This Is Your Body Asking for Something Different

Perimenopause is often framed as something to endure, a phase to get through with gritted teeth and a hope that it passes quickly. But that framing does women a real disservice.

This is your body telling you its needs have changed. When you meet those needs with nourishing food, adequate protein, balanced blood sugar, and targeted nutrients, women are regularly surprised by how much better they feel. Not just a bit better. Noticeably, meaningfully better.

The symptoms are real. But so is your ability to influence how this phase feels.

You don't have to white-knuckle your way through your 40s. With the right nutritional foundations in place, feeling energised, clear-headed, and strong is genuinely achievable at 42, 45, 48, and well beyond.

Ready to Stop Guessing and Start Feeling Better?

I work with women in perimenopause to build personalised nutrition plans around your specific symptoms, your lifestyle, and your actual life. No rigid plans. No restriction. Just practical, evidence-based support that works for real people.

Book a free discovery call to find out if nutritional therapy is right for you

This blog post is for informational purposes only and does not constitute medical advice. If you are experiencing significant symptoms, please speak with your GP or a qualified healthcare professional.

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Kirsty Larcombe Kirsty Larcombe

Why Am I Always Tired? 7 Nutritional Reasons You're Exhausted (And What to Do About It)

Constantly tired no matter how much you sleep? Discover 7 common nutritional causes of fatigue in women — and what a nutritional therapist recommends to get your energy back.

You've had a full night's sleep. You've had your coffee. It's 10am — and you're already exhausted.

Sound familiar?

If you're a woman who's been feeling persistently tired, low in energy, or just not quite yourself, you're not alone. Fatigue is one of the most common complaints I hear from clients who come to see me at my Wimbledon clinic and online. And more often than not, the answer isn't simply "sleep more" or "stress less."

The truth is, chronic fatigue is almost always a sign that something deeper is going on — and nutrition plays a far bigger role than most people realise.

In this post, I'm going to walk you through seven of the most common nutritional reasons women feel exhausted, and what you can actually do about them.

1. Iron Deficiency (Even Without Anaemia)

Iron deficiency is the most common nutritional deficiency in women of reproductive age in the UK — and fatigue is its number one symptom. But here's the thing: you don't need to be clinically anaemic to feel the effects. Low-normal ferritin (your iron storage protein) can leave you feeling bone-tired, foggy-headed and breathless on the stairs — yet a standard GP blood test will often come back "normal."

What to look for: Persistent tiredness, pale skin, feeling cold, poor concentration, brittle nails, hair loss.

What to do: Ask your GP to test your ferritin specifically, not just haemoglobin. Good dietary sources include red meat, liver, lentils, spinach and fortified cereals. Pair plant-based iron sources with vitamin C to improve absorption — and avoid tea and coffee with meals, as they significantly inhibit iron uptake

2. Blood Sugar Imbalance

If your energy crashes mid-morning or mid-afternoon, if you feel irritable or shaky when you haven't eaten, or if you rely on sugar or caffeine to keep going — blood sugar dysregulation could be at the root of your fatigue.

When blood sugar spikes and crashes repeatedly throughout the day (often triggered by skipping meals, eating refined carbohydrates, or not getting enough protein), your energy yo-yos with it. Over time, this pattern is exhausting for your body.

What to look for: Energy slumps after meals, sugar cravings, irritability when hungry, reliance on caffeine, difficulty concentrating.

What to do: Prioritise protein and healthy fats at every meal to slow glucose release and keep blood sugar steady between meals. Reduce refined carbohydrates, eat breakfast within an hour of waking, and aim for structured meals rather than constant snacking — every time you eat, you trigger an insulin response, so grazing throughout the day can actually keep your blood sugar on a rollercoaster rather than stabilising it. Three satisfying, balanced meals is usually a far better strategy than eating little and often.

3. Magnesium Deficiency

Magnesium is involved in over 300 biochemical reactions in the body, including energy production, sleep regulation and stress response. And yet it's estimated that a large proportion of adults in the UK don't get enough from diet alone — especially those under stress, who drink alcohol regularly, or who have digestive issues.

Low magnesium can leave you feeling exhausted, wired-but-tired, muscle-achy and unable to sleep deeply — even when you're in bed for eight hours.

What to look for: Poor sleep quality, muscle cramps or twitches, anxiety, headaches, constipation, sensitivity to noise.

What to do: Increase dietary sources including dark leafy greens, pumpkin seeds, dark chocolate, avocado, almonds and black beans. Magnesium glycinate or bisglycinate supplements are generally well tolerated and absorbed — but it's worth speaking to a practitioner before supplementing.

4. B12 and B Vitamin Deficiency

The B vitamins — particularly B12, B6, folate and B1 — are essential for converting food into usable energy. Without adequate levels, you'll feel sluggish no matter how well you sleep or how healthy you eat.

B12 deficiency is particularly common in women who follow plant-based diets, those who take the contraceptive pill or metformin, and those over 50 (as absorption naturally declines with age). B12 deficiency can also mimic symptoms of depression and cognitive decline, which is why it's so important to test rather than guess.

What to look for: Extreme tiredness, brain fog, low mood, tingling in hands and feet, mouth ulcers, poor memory.

What to do: If you eat meat and dairy, B12 deficiency is less common but still possible. Ask your GP to test serum B12 and folate. Plant-based eaters should supplement with methylcobalamin B12 and look for fortified foods. A good quality B-complex supplement can also help support overall energy metabolism.

5. Thyroid Dysfunction (Often Missed in Women)

Your thyroid gland controls your metabolism — essentially how efficiently your body produces and uses energy. When it's underactive (hypothyroidism), everything slows down. And while a GP will often test TSH (thyroid stimulating hormone), this single marker can miss subclinical hypothyroidism, which leaves many women feeling exhausted, cold, and foggy despite being told their results are "normal."

What to look for: Fatigue that doesn't improve with rest, weight gain despite no change in diet, feeling cold all the time, dry skin and hair, hair loss, constipation, low mood.

What to do: Ask your GP for a full thyroid panel including TSH, free T3 and free T4. Nutritionally, iodine, selenium and zinc all support healthy thyroid function. Selenium in particular — found in Brazil nuts (just 2–3 per day covers your needs) — is crucial for converting inactive thyroid hormone into its active form.

6. Gut Health Issues Affecting Nutrient Absorption

You can eat the most nutritious diet in the world — but if your gut isn't absorbing nutrients effectively, you'll still be running on empty. Conditions like IBS, low stomach acid, SIBO (small intestinal bacterial overgrowth) and intestinal permeability can all impair your ability to absorb the very nutrients needed for energy production.

This is why so many women with digestive issues also struggle with fatigue — the two are far more connected than most people realise.

What to look for: Bloating, irregular bowel movements, food sensitivities, fatigue after eating, or a long history of digestive problems.

What to do: A nutritional therapist can help investigate gut health using functional testing such as comprehensive stool analysis or breath testing for SIBO. Dietary strategies to support the gut lining and microbiome — including reducing processed foods, increasing fibre diversity and supporting stomach acid — can make a significant difference to both digestion and energy levels.

7. Adrenal Fatigue and Chronic Stress

While "adrenal fatigue" isn't a formal medical diagnosis, HPA axis dysregulation — where the stress response system becomes dysregulated after prolonged periods of stress — is very real. Cortisol, your main stress hormone, follows a natural daily rhythm: it should be high in the morning to get you going and decline by evening. When this rhythm is disrupted, you may feel wired at night and exhausted in the morning, or simply flat and depleted throughout the day.

Nutritionally, chronic stress depletes key nutrients including vitamin C, magnesium and B vitamins — creating a vicious cycle of stress and fatigue.

What to look for: Feeling most tired in the morning, getting a "second wind" late at night, craving salty foods, difficulty coping with stress, low stamina.

What to do: Prioritise protein and healthy fats at breakfast to support cortisol rhythms. Adaptogenic herbs like ashwagandha and rhodiola (under practitioner guidance) can help regulate the stress response. Reducing caffeine, particularly in the afternoon, is also key.

So, What Should You Do Next?

If you're nodding along to several of these, the most important thing to know is this: you don't have to just put up with feeling tired.

Persistent fatigue is your body's way of telling you something needs attention — and with the right investigation and support, most women see a significant improvement in their energy levels within weeks.

As a registered nutritional therapist, I work with women in Wimbledon, South West London and online to get to the root cause of their fatigue — using in-depth health assessments, GP blood test interpretation and functional testing where needed.

If you're tired of being tired, I'd love to help.

👉 Book a free 20-minute discovery call and let's figure out what's really going on.

About the Author

Kirsty Larcombe is a registered nutritional therapist (Dip CNM, mANP, mGNC) based in Wimbledon, London. She specialises in helping women overcome fatigue, hormone imbalance and digestive issues through personalised, root-cause nutrition. Learn more about working with Kirsty →

Disclaimer: This blog post is for informational purposes only and does not constitute medical advice. Always consult a qualified healthcare professional before making changes to your diet or supplement regimen.

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Kirsty Larcombe Kirsty Larcombe

Nutrition & Mental Health

What you eat affects more than your waistline — it shapes your mood, your stress response, and your mental resilience. Discover the fascinating (and frequently misunderstood) science behind the gut-brain connection, and five simple ways to start eating for your mental health today.

Your Mood Is on the Menu: The Surprising Link Between What You Eat and How You Feel

The food on your plate doesn't just fuel your body — it shapes your thoughts, your stress levels, and your mental resilience. Here's what the science actually says.

What if your anxiety, low mood, or brain fog wasn't "just in your head" — but was sitting in your gut, waiting to be addressed with a fork?

Most of us accept that diet affects our waistline. Fewer of us connect it to our mental health — even though we've all experienced the evidence firsthand. (Anyone who has eaten an entire sharing bag of crisps alone on a Tuesday night and felt worse afterwards, not better, knows exactly what we're talking about.)

Emerging research reveals something genuinely fascinating: the food you eat directly influences your brain chemistry, your stress hormones, and your capacity for emotional resilience. This is the gut-brain connection — and the science behind it is more sophisticated, and more empowering, than most people realise.

The gut is your second brain — but not in the way you think

You may have read that the gut produces around 90% of the body's serotonin. This is true — but it's often misunderstood, and frankly, a lot of wellness content gets this a bit wrong. Gut-derived serotonin doesn't cross the blood-brain barrier, so it can't directly top up your mood like some kind of intestinal happiness delivery service.

The real story is more nuanced, and far more interesting. Your gut and brain are in constant two-way conversation via several distinct pathways. Think of it less like a simple pipeline and more like a very busy group chat — with your bacteria, nerves, and biochemistry all chiming in simultaneously.

How the gut talks to the brain

The vagus nerve

Gut serotonin acts locally to stimulate the vagus nerve — the main communication superhighway running between your gut and brain. This vagal signalling directly influences emotional regulation, stress response, and mood. A well-nourished gut sends calmer, more stable signals upward. A struggling one? Not so much.

Tryptophan & brain serotonin

Your gut microbiome influences how much tryptophan — serotonin's building block — makes it into circulation and crosses the blood-brain barrier. The brain then uses this to synthesise its own serotonin. So a healthy gut supports brain serotonin indirectly, by controlling the supply of raw materials. Your gut isn't the mood factory. It's the factory that supplies the factory.

The kynurenine pathway

When the gut is inflamed or out of balance, tryptophan gets hijacked down the kynurenine pathway instead — producing compounds associated with neuroinflammation and depression rather than serotonin. In other words, an unhealthy gut isn't just failing to help your mood; it may be actively working against it. Supporting gut health could literally redirect tryptophan back towards feel-good chemistry.

Short-chain fatty acids (SCFAs)

When your gut bacteria ferment dietary fibre, they produce SCFAs like butyrate — compounds that cross into the bloodstream, reduce neuroinflammation, and support brain function through their own pathways. This is one of the most compelling arguments for eating your vegetables. Your gut bacteria will literally thank you. (In their own microbial way.)

90% of the body's serotonin is produced in the gut

100M+ nerve cells in your digestive system

32% reduced depression risk with a Mediterranean-style diet*

Nutrients your brain is quietly desperate for

The brain is a demanding organ — it consumes around 20% of your daily energy and relies on a steady supply of specific nutrients to function well. When those nutrients are missing, it doesn't always send an obvious memo. Instead, you just feel a bit... flat. Foggy. Snappy at people who don't deserve it. Sound familiar?

These are the nutrients most consistently linked with mood, anxiety, and cognitive function — and the ones most commonly lacking in modern diets:

  • Omega-3 fatty acids (oily fish, walnuts, flaxseed) — essential for brain cell structure and reducing neuroinflammation

  • Magnesium (dark leafy greens, pumpkin seeds, dark chocolate) — regulates the stress response and supports sleep. Also, yes, dark chocolate counts.

  • B vitamins (eggs, legumes, wholegrains) — critical for producing mood-regulating neurotransmitters like dopamine and serotonin

  • Zinc (meat, shellfish, legumes) — low levels are strongly associated with depression and anxiety, yet it rarely gets the attention it deserves

  • Vitamin D (sunlight, oily fish, fortified foods) — particularly relevant if you live somewhere that considers a grey drizzle a "nice day"

The blood sugar rollercoaster (and why it's ruining your afternoon)

Ultra-processed foods, refined sugars, and skipping meals send blood sugar spiking and crashing throughout the day. Each crash triggers a cortisol (stress hormone) response — which, repeated daily, contributes to anxiety, irritability, and that inexplicable 3pm feeling of quiet despair.

It’s not a personality defect. You might just need lunch.

Stabilising blood sugar through balanced meals — combining protein, fibre, and healthy fats — is one of the simplest and most effective tools for supporting mental wellbeing. And yet it's rarely the first thing suggested.

Where to start (without overhauling your entire life)

You don't need a perfect diet to support your mental health — and anyone who tells you otherwise is probably trying to sell you something. Research consistently shows that even modest, sustainable improvements can shift mood meaningfully within weeks. Here are five genuinely doable places to begin:

  • Add a portion of oily fish (salmon, mackerel, sardines) 2–3 times per week — tinned counts, and it's cheaper

  • Include a daily serving of fermented food — live yoghurt, kefir, sauerkraut, or kimchi — to support your microbiome

  • Eat breakfast with protein to anchor your blood sugar before the day gets away from you

  • Aim for 30 different plant foods per week to maximise microbiome diversity and SCFA production — this sounds like a lot, but herbs, spices, and nuts all count

  • Reduce ultra-processed snacks and replace with whole food alternatives — not forever, not all the time, just mostly

Ready to support your mental health from the inside out?

Nutritional therapy takes a genuinely personalised approach — looking at your specific dietary patterns, potential nutrient gaps, and gut health picture to understand what might be affecting your mood, energy, and focus. No one-size-fits-all plans. No guilt. Just practical, evidence-based support.

Book a free discovery call →

* Based on a 2019 meta-analysis published in Molecular Psychiatry. Individual results vary. This article is for educational purposes and does not constitute medical advice.

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Kirsty Larcombe Kirsty Larcombe

what does ibs actually mean?

Many people are told they have IBS when they experience bloating, diarrhoea or abdominal pain — but IBS is often a description of symptoms rather than an explanation of the cause. In this article, nutritional therapist Kirsty Larcombe explores what IBS can actually mean, the hidden gut issues that may be driving digestive symptoms, and how functional digestive testing can sometimes reveal the root cause.

IBS Isn’t a Diagnosis — It’s a Clue

What digestive testing can reveal when symptoms don’t make sense

Many people are told they have IBS (Irritable Bowel Syndrome) when they experience symptoms like:

  • Bloating

  • Diarrhoea

  • Constipation

  • Abdominal pain

  • Gas

  • Urgency after eating

While this label can be helpful for ruling out serious disease, it doesn’t actually explain why the symptoms are happening.

In clinical practice, IBS is often less of a diagnosis and more of a description of symptoms.

And those symptoms can have many different underlying causes.

What IBS can actually mean

When someone comes to me with IBS-type symptoms, there are several things I start thinking about.

1. Microbiome imbalance (dysbiosis)

The gut contains trillions of bacteria that play an important role in digestion, immunity and metabolism.

If certain bacteria become overrepresented — or beneficial bacteria are depleted — digestion can become disrupted, leading to bloating, gas, diarrhoea or constipation.

2. Digestive insufficiency

Some people simply aren’t breaking food down properly.

Low stomach acid, poor bile production or insufficient digestive enzymes can lead to food fermenting in the gut instead of being digested efficiently.

This can trigger symptoms like:

  • bloating after meals

  • loose stools

  • undigested food in stool

  • fatigue after eating

3. Gut inflammation

Inflammation in the digestive tract can affect the gut lining and alter how the intestines move food through the system.

This may show up as:

  • diarrhoea

  • abdominal discomfort

  • increased gut permeability (“leaky gut”)

4. Microbial overgrowth

Sometimes symptoms are caused by organisms that shouldn’t be present in large amounts.

These can include:

  • bacterial overgrowth

  • yeast overgrowth

  • parasites

These organisms can disrupt digestion and produce compounds that irritate the gut.

5. Gut immune activation

The gut is one of the body’s largest immune organs.

If the immune system is activated in the digestive tract, it can drive inflammation, sensitivity and altered bowel movements.

Why testing can sometimes be helpful

In some cases, diet and lifestyle adjustments are enough to improve symptoms.

But when symptoms are persistent or unexplained, functional testing can help us understand what is actually happening inside the gut.

A comprehensive stool test can measure things such as:

  • microbiome balance

  • digestive enzyme production

  • inflammatory markers

  • immune activity

  • short-chain fatty acid production

  • presence of parasites or yeast

This provides valuable data that allows a treatment plan to be targeted rather than guess-based.

A recent example from clinic

Recently I worked with a client who had been struggling with chronic diarrhoea for years.

She had already tried multiple dietary approaches and had been told it was likely IBS.

But her symptoms weren’t improving.

So we decided to run a comprehensive stool test.

What the test revealed was extremely helpful.

It showed:

  • significant disruption in her gut bacteria

  • signs of intestinal inflammation

  • impaired digestive function

In other words, her symptoms weren’t random — they were being driven by identifiable dysfunction in the gut.

Using this information, we were able to build a targeted protocol to support microbial balance, reduce inflammation and improve digestion.

Within a few months, her digestion had improved significantly and the diarrhoea that had been affecting her daily life began to resolve.

The takeaway

IBS is often treated as if it’s the end of the diagnostic process.

But in many cases, it should be the start of a deeper investigation.

Digestive symptoms are the body’s way of signalling that something in the gut environment isn’t working as it should.

When we understand what is driving those symptoms, we can often create a much more effective path back to digestive health.

If you’re struggling with digestive symptoms

If you’ve been told you have IBS but still feel like something isn’t quite right, it may be worth looking deeper.

Understanding what’s happening in the gut can often provide the missing piece of the puzzle.

Kirsty Larcombe

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Kirsty Larcombe Kirsty Larcombe

Why Well-Meaning January Diets Don’t Work

January diets often fail due to stress, hormones and metabolism. Learn why restriction doesn’t work — and what leads to sustainable weight loss.

(And what actually does)

Every January, the same pattern repeats.

Motivation is high.
Plans are made.
Diets begin with the very best intentions.

And yet, by February (sometimes sooner), most people feel:

  • Hungrier

  • More tired

  • More frustrated

  • And often heavier than when they started

This isn’t because people lack discipline or commitment.
It’s because January diets fundamentally misunderstand how the body and brain work.

Let’s look at why — from both a psychological and physiological perspective — and what actually leads to lasting change.

The Psychological Problem with January Diets

January diets are usually born from guilt.

Overindulgence at Christmas is framed as something that needs to be “fixed”, “undone” or “paid for”. That mindset alone creates problems before food even enters the picture.

1. They rely on restriction, not trust

Most diets start with rules:

  • Eat less

  • Cut food groups

  • Ignore hunger

  • Be “good”

Psychologically, restriction increases obsession.
When food is labelled as “off limits”, it becomes more mentally dominant — not less.

This creates:

  • Increased food focus

  • Cravings

  • All-or-nothing thinking

  • A sense of failure at the first slip

Once the diet is “broken”, many people abandon it entirely.

2. They activate stress, not self-regulation

Dieting is stressful — mentally and emotionally.

Constant decision-making, tracking, weighing, and self-monitoring keeps the nervous system in a heightened state. From a psychological standpoint, this reduces your capacity for self-regulation.

A stressed brain seeks quick energy and comfort — not restraint.

Which brings us to the physiology.

The Physiological Problem with January Diets

Your body doesn’t know it’s January.

It doesn’t know you’re trying to “be healthier”.
It only knows whether food feels abundant or scarce.

3. Your body is hard-wired for survival

The human body evolved to survive famine, not modern dieting culture.

When calories drop or food intake becomes unpredictable, your body interprets this as a potential threat and responds accordingly.

It adapts by:

  • Increasing hunger hormones

  • Slowing metabolic rate

  • Reducing energy expenditure

  • Making food more rewarding

This isn’t a flaw — it’s protection.

4. Weight is regulated by hormones, not willpower

One of the most misunderstood aspects of weight loss is the role of hormones — particularly insulin.

As Dr Jason Fung explains in The Obesity Code, weight gain and loss are not simply about calories in versus calories out.

Insulin is a storage hormone.
When insulin is high, fat storage is switched on and fat burning is switched off.

Many January diets:

  • Reduce calories

  • But keep insulin high (through frequent eating, ultra-processed foods, and stress)

The result?
A body that is hungry, tired, and resistant to fat loss.

5. Repeated dieting lowers your metabolic “set point”

Over time, cycles of dieting and regaining can teach the body to defend a higher weight.

This happens because:

  • Metabolic rate adapts downward

  • Lean muscle is lost

  • Hunger signals become stronger

Weight loss becomes harder with each attempt — not because you’re failing, but because your body is learning to protect itself.

So… What Actually Works?

Sustainable weight loss doesn’t come from fighting your body.
It comes from creating conditions where your body feels safe enough to let weight go.

Here’s what that looks like in practice.

1. Stop chronic undereating

Long-term calorie restriction is one of the fastest ways to slow metabolism.

Instead:

  • Eat enough at meals

  • Prioritise nourishment over punishment

  • Reduce the constant “on/off” dieting cycle

A well-fed body is far more metabolically responsive.

2. Stabilise blood sugar and insulin

Rather than focusing on calories, focus on how your meals are built.

This means:

  • Protein at every meal

  • Healthy fats for satiety

  • Fibre-rich whole foods

  • Fewer ultra-processed carbohydrates

Stable blood sugar leads to:

  • Fewer cravings

  • More consistent energy

  • Lower insulin levels over time

3. Eat less frequently (without extremes)

Constant grazing keeps insulin elevated all day.

Allowing clear breaks between meals gives your body time to access stored energy.

This doesn’t require extreme fasting — simply:

  • Reducing snacking

  • Eating structured meals

  • Finishing eating earlier in the evening where possible

4. Build muscle, don’t just chase the scale

Muscle is metabolically active tissue.

Supporting muscle through:

  • Resistance training

  • Adequate protein

  • Not under-eating

…helps raise your metabolic baseline so weight loss is easier to maintain.

5. Address stress and sleep

A stressed body does not prioritise fat loss.

Chronic stress raises cortisol, which:

  • Increases insulin resistance

  • Drives abdominal fat storage

  • Increases cravings

Improving sleep, nervous system regulation, and daily stress load is not optional — it’s foundational.

A Different Way to Think About January

January doesn’t need to be about restriction, punishment, or “starting over”.

It can be a time to:

  • Restore trust with your body

  • Support your metabolism

  • Create habits that feel sustainable year-round

Weight loss that lasts feels calmer.
Less desperate.
Less forced.

And when your body feels safe, it stops fighting you.

Final Thought

If January diets haven’t worked for you before, it’s not because you didn’t try hard enough.

It’s because they weren’t designed with human biology — or psychology — in mind.

You don’t need more willpower.
You need an approach that works with your body, not against it.

If you need my help to create this approach, click here to book a free 20-minute discovery call today.

I’ve created a 6-step plan to sustainable weightloss to get you started. Click here to download it.

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Kirsty Larcombe Kirsty Larcombe

What is the best diet-a functional nutritionist’s pov-

What’s the best diet for the New Year? High-protein, plant-based, fasting, Mediterranean? The truth is, the best diet is the one that works for your body. Foods that are healthy for one person can trigger symptoms in another. Discover why personalised, root-cause nutrition beats one-size-fits-all diets — and how to find what truly supports your energy, digestion, hormones and health this year.

The Answer: The One That’s Best for You

Every January, the same question pops up everywhere:

“What’s the best diet for the New Year?”

High-protein. Plant-based. Keto. Mediterranean. Low-carb. Fasting. No sugar. No dairy. No fun.

And while each of these approaches can be helpful, there’s a truth that rarely makes the headlines:

The best diet is the one that works for your body, your biology, and your current health.

Because food isn’t inherently “good” or “bad” — it’s contextual.

Let’s break that down.

Why One-Size-Fits-All Diets Don’t Work

Your body is shaped by a unique combination of:

  • Genetics

  • Hormones

  • Gut health

  • Stress levels

  • Sleep quality

  • Nutrient status

  • Past dieting history

Two people can eat the same foods and have completely different outcomes.

That’s why so many people start January feeling motivated… and end up frustrated, bloated, exhausted, or convinced they’ve “failed” — when actually, the diet failed them.

“Healthy” Diets That Aren’t Always Healthy (For Everyone)

Here are some common examples I see in clinic all the time 👇

High-Protein Diets

High-protein diets are often recommended for:

  • Muscle building

  • Blood sugar balance

  • Weight management

But if you have:

  • Low stomach acid

  • Sluggish digestion

  • Gallbladder issues

  • Chronic stress

You may struggle to break protein down properly — leading to bloating, reflux, constipation, or fatigue.

More protein isn’t always the answer. Sometimes better digestion is.

Leafy Greens (Yes, Even Spinach)

Spinach, kale, and chard are packed with nutrients — on paper.

However, for some people they can:

  • Worsen joint pain

  • Irritate the gut

  • Contribute to kidney stress

Why? Because they’re high in oxalates, which some bodies struggle to clear efficiently.

If you notice symptoms after “doing all the right things,” this could be why.

Fermented Foods & Apple Cider Vinegar

Kimchi, sauerkraut, kefir, kombucha, apple cider vinegar — all widely praised for gut health.

But if you have:

  • Histamine intolerance

  • Mast cell activation

  • Migraines

  • Anxiety or insomnia linked to food

These foods can actually increase symptoms rather than help them.

A “gut-healing” food for one person can be a trigger for another.

Fasting & Skipping Meals

Intermittent fasting can improve metabolic flexibility for some people.

But for others — particularly women — it can:

  • Disrupt hormones

  • Increase cortisol

  • Worsen fatigue

  • Trigger binge–restrict cycles

Especially if you’re already under-eating, over-stressed, or dealing with thyroid or adrenal issues.

The Real Question Isn’t “What Diet Should I Follow?”

A better question is:

“What does my body need right now?”

That depends on things like:

  • Are you inflamed or depleted?

  • Is your gut absorbing nutrients well?

  • Are your hormones stable?

  • Is your nervous system stuck in stress mode?

  • Are you fuelling properly — or just eating less?

Nutrition works best when it supports physiology, not trends.

A Better Way to Approach the New Year

Instead of starting with restriction, try starting with curiosity.

Ask:

  • What foods genuinely make me feel better?

  • Where do I feel low energy, bloated, foggy, or stuck?

  • What patterns keep repeating despite “healthy” eating?

This is where personalised, root-cause nutrition comes in.

Your New Year Diet Should Feel Supportive — Not Punishing

The right diet should:

  • Give you stable energy

  • Support digestion

  • Help you feel clear-headed

  • Fit your real life

  • Adapt as your body changes

Not leave you Googling symptoms at 2am wondering what you’re doing wrong.

Final Thought

There is no perfect diet.

There is only:
The right approach, at the right time, for the right body.

And that can change — seasonally, hormonally, and as your health evolves.

If you’d like help understanding what your body needs right now, that’s exactly where personalised nutrition can make all the difference.

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Kirsty Larcombe Kirsty Larcombe

GLP-1 Weight Loss Injections: Pros, Cons & Why Nutrition Still Matters

GLP-1 injections such as Ozempic and Wegovy can support weight loss, but they often overlook the deeper issues: nutrition, hormones, metabolism and long-term health. Discover the real benefits and risks, and what your body still needs to thrive.

GLP-1 weight-loss injections such as Ozempic, Wegovy and Mounjaro have become one of the most talked-about health trends of the last few years. Praised for their ability to reduce appetite and support rapid weight loss, they’re now being used far beyond their original purpose of treating type 2 diabetes.

But as a nutritional therapist, I see a growing concern:

Weight loss is being medicated — while nutrition is being sidelined.

This article breaks down:

  • What GLP-1s actually do

  • The real pros and cons

  • And why focusing on appetite alone misses the deeper picture of health, hormones, metabolism and long-term wellbeing

What Are GLP-1 Weight Loss Drugs?

GLP-1 stands for Glucagon-Like Peptide-1, a hormone made in the gut that:

  • Regulates blood sugar

  • Slows stomach emptying

  • Sends “I’m full” signals to the brain

  • Reduces appetite

GLP-1 medications mimic this hormone, helping people feel fuller for longer and eat less.

Originally developed for diabetes management, they are now widely prescribed for:

  • Weight loss

  • Insulin resistance

  • Obesity

  • PCOS

  • Metabolic syndrome

The Pros of GLP-1 Weight Loss Injections

There’s no denying that for some people, these medications can be helpful — especially when used appropriately and medically supervised.

Potential benefits include:

  • ✅ Powerful appetite suppression

  • ✅ Rapid weight loss

  • ✅ Improved blood sugar control

  • ✅ Reduced insulin resistance

  • ✅ Lower food cravings for some people

  • ✅ Can be life-changing for people with severe obesity

For individuals who have struggled for years with weight, metabolic dysfunction or emotional eating, GLP-1s can feel like a relief — and for some, they are a useful starting point.

The Downsides & Risks No One Talks About Enough

Where I see concern is when GLP-1s are treated as a solution, rather than a tool.

1. Muscle Loss, Not Just Fat Loss

Rapid weight loss increases the risk of:

  • Muscle wasting

  • Slower metabolism

  • Weaker bones

  • Reduced long-term fat-burning capacity

Muscle is metabolically protective — losing it makes long-term weight maintenance harder.

2. Nutrient Deficiencies

When appetite drops dramatically, so often does nutrient intake.

This increases the risk of low:

  • Protein

  • Iron

  • Magnesium

  • B vitamins

  • Zinc

  • Omega-3 fats

These nutrients are essential for:

  • Hormone production

  • Thyroid function

  • Energy

  • Mood

  • Fertility

  • Immune health

Eating less without strategic nutrition can quietly create deeper health issues.

3. Gut Side Effects

Many people experience:

  • Nausea

  • Constipation

  • Diarrhoea

  • Bloating

  • Acid reflux

This can worsen:

  • IBS

  • SIBO

  • Low stomach acid

  • Sluggish digestion

And if digestion is impaired, nutrient absorption drops even further.

4. The Mental Health Impact

For some, appetite suppression leads to:

  • Emotional flattening around food

  • Fear of eating without the drug

  • Rebound bingeing when stopped

  • Anxiety about weight regain

Weight loss without addressing stress, emotional eating, sleep and nervous system regulation is rarely stable.

The Bigger Issue: A Return to 1980s Diet Culture

What concerns me most is that GLP-1s can quietly reinforce an old narrative:

“Eat as little as possible. Be as small as possible. Health will follow.”

This is not true health.

It echoes:

  • Low-fat, low-everything dieting

  • Chronic restriction

  • Fear of hunger

  • Suppressing the body rather than supporting it

The truth is:
👉 You don’t heal your physiology by starving it into submission.

You heal it by feeding it properly.

Why Nutrition Still Matters (Even on GLP-1s)

Your body runs on co-factors — vitamins, minerals, protein, essential fats and amino acids that drive:

  • Hormone production

  • Detoxification

  • Energy creation (mitochondria)

  • Brain chemistry

  • Thyroid function

  • Blood sugar balance

  • Feminine hormone balance (especially in perimenopause)

Suppressing appetite without supplying these physiological building blocks risks:

  • Fatigue

  • Hair loss

  • Hormone disruption

  • Slower metabolism

  • Poor recovery

  • Skin issues

  • Mood instability

Weight loss does not equal health.

GLP-1s and Women Over 40

This is especially relevant in:

  • Perimenopause

  • Hormonal weight gain

  • High cortisol

  • Thyroid dysfunction

  • Insulin resistance

At this life stage, women already experience:

  • Natural muscle loss

  • Blood sugar instability

  • Oestrogen-progesterone fluctuations

  • Increased stress load

Adding aggressive appetite suppression without nutritional scaffolding can worsen:

  • Fatigue

  • Low mood

  • Sleep issues

  • Hormonal symptoms

A Smarter Conversation: Medication + Metabolic Support

I am not anti-medication.
But I am pro-physiology.

If someone is using a GLP-1 medication, they should also be supported with:

  • ✅ High-protein nutrition

  • ✅ Mineral support

  • ✅ Blood sugar-balancing meals

  • ✅ Gut health support

  • ✅ Muscle-preserving strength training

  • ✅ Hormonal and thyroid monitoring

Medication should support health — not replace it.

So, Do GLP-1s “Work”?

Yes — they work at:
✅ Appetite control
✅ Short-term weight loss

But they do not address:
❌ Metabolic dysfunction
❌ Hormone imbalance
❌ Emotional eating
❌ Stress physiology
❌ Nutrient depletion
❌ Gut health
❌ Root-cause weight gain

Without those foundations, weight regain is common once the medication stops.

The Take-Home Message

GLP-1 medications can be a tool, but they are not a long-term strategy for health.

True, sustainable wellbeing comes from:

  • Nourishing your body

  • Supporting your hormones

  • Feeding your metabolism

  • Regulating your nervous system

  • And rebuilding trust with food

Weight loss without nourishment is not progress — it’s just a different form of stress.

Want Support With Weight, Hormones & Energy — Without Extreme Restriction?

At Future You Nutrition, I specialise in helping people rebalance:

  • Blood sugar

  • Hormones

  • Gut health

  • Stress

  • Energy

  • And weight — without starvation

If you’re:

  • On a GLP-1

  • Considering one

  • Or struggling with stubborn weight and low energy

I’d love to support you properly.

👉 Book a free discovery call

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Kirsty Larcombe Kirsty Larcombe

Why Midlife Weight Gain Isn’t About Willpower — It’s About Hormones

Struggling with midlife weight gain? Discover how hormones like oestrogen, progesterone, cortisol, and insulin affect your metabolism — and how to rebalance them naturally for sustainable weight loss after 40.

You’re doing everything “right”… but the scales won’t budge.

You’ve swapped takeaways for salads, squeezed in Pilates between meetings, and maybe even cut carbs — yet your jeans still feel tighter than they used to.

Sound familiar?

If you’re a woman in your 40s or 50s, you’re not imagining it — your body has changed. But here’s the truth: midlife weight gain isn’t about a lack of willpower. It’s about your hormones.

When your hormones shift, so does the way your body stores fat, uses energy, and manages stress. Understanding why this happens — and how to rebalance it — is the key to feeling like yourself again.

1. Why Hormones Hold the Keys to Your Metabolism

Hormones are your body’s internal messaging system. They control hunger, fat storage, energy, mood, and even motivation.

In your 20s and 30s, these messages are smooth and balanced — oestrogen, progesterone, insulin, thyroid hormones, and cortisol all work in sync.

But from your early 40s onwards, perimenopause begins — and these hormone levels start to fluctuate unpredictably.

That’s when many women notice:

  • Extra weight around the middle

  • Slower metabolism

  • Increased cravings (especially for carbs and sugar)

  • Poorer sleep and mood changes

  • Feeling “puffy” or inflamed

These aren’t signs of getting older — they’re messages from your hormones asking for a reset.

2. The Oestrogen–Progesterone See-Saw

Oestrogen and progesterone are two of your most powerful hormones, and they influence far more than fertility.

Oestrogen’s role in metabolism

Oestrogen helps regulate insulin sensitivity and keeps fat distribution balanced — mainly around the hips and thighs. As oestrogen declines in perimenopause, insulin resistance can rise, making it easier to gain fat around the abdomen.

Progesterone’s calming effect

Progesterone supports restful sleep, mood, and fluid balance. When levels drop (as they do before menopause), many women notice:

  • Increased anxiety or restlessness

  • Water retention and bloating

  • Sugar cravings or “comfort eating”

  • Poor sleep — which drives cortisol and appetite up

This hormonal imbalance sets the stage for midlife weight gain, especially when combined with modern-day stress and erratic eating patterns.

3. Cortisol: The Hidden Weight-Gain Hormone

You’ve probably heard of cortisol, your main stress hormone.
It’s meant to help you survive short bursts of pressure — like a deadline or a workout. But when stress becomes chronic, cortisol stays elevated, and your body stays in “fight-or-flight” mode.

That means:

  • Fat is stored (especially around your waist)

  • Muscle is broken down for quick energy

  • Thyroid hormones slow down (reducing metabolism)

  • Cravings increase as your body looks for easy fuel

For many women, stress is the silent driver behind stubborn weight gain — even when diet and exercise are on point.

And because cortisol and oestrogen share biochemical pathways, stress can directly worsen hormone imbalance, amplifying symptoms like low mood, anxiety, and disrupted sleep.

4. Insulin Resistance: The Blood Sugar Connection

Insulin is another major player in the midlife metabolism puzzle.
Its job is to move glucose (sugar) from your bloodstream into your cells to use for energy.

But here’s the catch: when you constantly snack, skip meals, or rely on caffeine and refined carbs, insulin spikes repeatedly. Over time, your cells become less responsive — a condition known as insulin resistance.

When that happens:

  • More glucose stays in your blood

  • The body stores excess as fat (particularly visceral fat)

  • Energy crashes become frequent

  • Appetite and cravings spiral out of control

Declining oestrogen levels make this worse, reducing insulin sensitivity even further.

The result? Even “healthy” foods like oats or smoothies can trigger fat storage if your blood sugar balance is off.

5. Thyroid Function: The Metabolic Thermostat

Your thyroid gland controls your metabolic rate — how quickly you burn calories for energy.

In midlife, thyroid function can dip subtly (especially in women with autoimmune tendencies like Hashimoto’s), leading to:

  • Sluggish digestion

  • Constipation or bloating

  • Cold hands and feet

  • Brain fog and fatigue

  • Weight gain despite eating clean

Low thyroid output can be worsened by nutrient deficiencies (iodine, selenium, zinc), chronic stress, or gut inflammation — all areas a nutritionist can assess and address holistically.

6. Sleep, Mood, and Appetite: The Ripple Effect

Ever noticed how after a poor night’s sleep, you crave carbs or sugar the next day? That’s not coincidence — that’s ghrelin and leptin, your hunger and fullness hormones, getting scrambled.

Lack of restorative sleep increases ghrelin (which stimulates appetite) and lowers leptin (which tells you you’re full). Combined with cortisol surges and erratic oestrogen levels, it’s the perfect recipe for emotional eating and weight gain.

Supporting sleep quality through nutrition, circadian rhythm cues, and relaxation practices can transform not just weight, but mood, focus, and motivation.

7. The Gut–Hormone Connection

Your gut does far more than digest food — it also helps process and eliminate hormones.

An imbalanced microbiome (from antibiotics, stress, poor diet, or constipation) can lead to oestrogen dominance, where used oestrogen isn’t cleared effectively and recirculates in the body.

Symptoms of oestrogen dominance include:

  • PMS-type symptoms in perimenopause

  • Bloating and water retention

  • Breast tenderness

  • Weight gain around hips or thighs

Nourishing your gut with fibre, fermented foods, and plant diversity can dramatically improve both digestion and hormonal balance.

8. How to Support Your Hormones — Naturally

Here’s the good news: you don’t need extreme diets or endless cardio. The most effective strategy is supporting your hormones and metabolism from the inside out.

Step 1- Balance Blood Sugar

  • Anchor every meal around protein, healthy fats, and fibre.

  • Avoid skipping meals or fasting excessively.

  • Choose slow-burn carbohydrates like quinoa, lentils, or sweet potato.

  • Limit caffeine on an empty stomach.

This keeps insulin stable and prevents fat storage signals.

Step 2- Support Liver Detoxification

Your liver processes used hormones — especially oestrogen.
Help it work efficiently by including:

  • Cruciferous vegetables (broccoli, kale, cauliflower, I love broccoli sprouts for this)

  • Bitter greens (rocket, watercress, chicory)

  • Hydration + lemon water

  • Reducing alcohol

Step 3- Manage Stress and Cortisol

You can’t eliminate stress, but you can change how your body responds.

  • Prioritise restorative movement — walking, yoga, Pilates

  • Create a consistent wind-down routine before bed

  • Add magnesium (through leafy greens, avocado, pumpkin seeds)

  • Try breathwork or journaling to calm the nervous system

Step 4- Nourish the Thyroid

Support optimal thyroid hormone production with:

  • Selenium (Brazil nuts, eggs, mushrooms)

  • Zinc (pumpkin seeds, seafood)

  • Iodine (seaweed, white fish)

  • Iron (grass-fed meat, lentils)

If you’ve noticed persistent fatigue or cold intolerance, functional thyroid testing can reveal what’s really happening beneath the surface.

Step 5- Move Intelligently

Over-exercising can raise cortisol and worsen fatigue.
Focus on:

  • Resistance training to build lean muscle (improves insulin sensitivity)

  • Walking after meals to balance blood sugar

  • Yoga or stretching for stress relief

Step 6- Support Gut Health

  • Eat 30+ different plant foods per week

  • Include fermented foods (sauerkraut, kefir, kimchi)

  • Add prebiotic fibres (onions, garlic, leeks, flaxseed)

  • Address constipation gently — hormones can’t leave the body if you’re not eliminating daily

9. The Power of Personalisation

No two women experience perimenopause or midlife changes the same way.
Your genetics, gut microbiome, stress levels, and nutrient status all shape your hormonal landscape.

That’s why generic diets often fail — they don’t address your root causes.

A personalised nutrition approach can uncover:

  • How well your body is processing oestrogen

  • Whether blood sugar and insulin are driving weight gain

  • If thyroid function or cortisol imbalance are involved

  • How gut health and nutrient absorption are affecting metabolism

Once you understand your unique picture, real progress happens — without restriction or overwhelm.

10. Your Midlife Reset Starts Here

If you’ve been blaming yourself for weight gain, fatigue, or mood swings, it’s time to stop the guilt.
Your body isn’t broken — it’s just communicating that it needs support.

With the right nutrition, testing, and lifestyle shifts, it’s entirely possible to rebalance your hormones, reignite your metabolism, and feel confident in your skin again.

At Future You Nutrition, I help women in their 40s and 50s uncover what’s really going on beneath the surface — from hormone imbalances to metabolic slowdowns — and create a plan that works with your biology, not against it.

💬 Book your free 20-minute consultation today to discover your next best step.

Because your future self deserves to feel light, energised, and empowered — not stuck and frustrated.

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Kirsty Larcombe Kirsty Larcombe

fasting for women. is it helpful or harmful?

To fast or not to fast….that this the question. Here I try to debunk all the myths and answer the question-Is fasting appropriate for women?

a complete guide on if/how/when to fast for women…


Fasting has become one of the biggest wellness trends — from 16:8 to 5:2 — with promises of better energy, fat loss and longevity. But what works brilliantly for men doesn’t always suit women’s biology.

Years of study in nutrition, and to be honest with you, it still confuses me! There seem to be two schools of thought on this subject-

  1. (Let’s name them)…The optimal protein pack…those that say you need to eat a gram of protein for every pound of ideal body weight. That skipping breakfast causes stress, breakfast is the most important meal of the day.

  2. Then you have the fasting friends (rubbish name I know, but stay with me) who expound the effects of time restricted eating for autophagy (more on that later), weightloss and blood sugar regulation.

Actually, both of these perspectives have their merit. In this blog I will cover: the science, pros, cons, and how to know if fasting is right for you.

1. What Happens in the Body During Fasting

When we stop eating for a period of time, our body shifts from a fed (anabolic) state to a fasted (catabolic) one. In the fed state, insulin rises, nutrients are stored, and the body focuses on building and repair. During fasting, insulin levels fall and the body begins mobilising stored energy — first glycogen, then fat.

Two key cellular pathways are central to this process: mTOR and autophagy.

  • mTOR acts like a growth switch — stimulating protein synthesis, cell growth, and tissue repair. It’s activated when we eat, particularly in response to protein and insulin.

  • Autophagy is the body’s internal recycling programme. When nutrients are scarce, cells clean up damaged components and reuse them to maintain efficiency.

A healthy rhythm between these two systems — alternating periods of nourishment (mTOR activation) and rest/repair (autophagy) — appears to support longevity and metabolic resilience. The problem arises when the balance tips too far in either direction: constant eating keeps mTOR permanently switched on, but chronic fasting can suppress it excessively, impairing recovery and hormonal balance.

2. The Potential Benefits of Fasting

When used strategically, fasting can offer a range of benefits — especially when combined with nutrient-dense meals and a balanced lifestyle.

Metabolic Health

Short fasts (such as 12–14 hours overnight) can improve insulin sensitivity, lower fasting glucose, and support more stable energy levels throughout the day. This may help reduce cravings and promote fat metabolism.

Brain and Mood

Periods of fasting have been shown to increase BDNF (Brain-Derived Neurotrophic Factor), a compound that supports learning, focus, and neuroplasticity. Many women report enhanced mental clarity when fasting is done gently and not combined with sleep deprivation or excessive stress.

Cellular Renewal and Longevity

Autophagy helps clear damaged mitochondria and proteins — reducing oxidative stress and potentially slowing aspects of the ageing process. This is one reason fasting is often linked with longevity in animal studies and emerging human data.

Inflammation and Gut Rest

Digestive rest may reduce post-meal inflammation and support a healthier gut environment, particularly for those prone to bloating or sluggish digestion.

Key takeaway: Fasting can be a useful reset — but it works best when your body is already nourished, not depleted.

3. The Drawbacks and Risks — Especially for Women

While fasting can be beneficial, women’s hormonal systems are finely tuned to energy availability. Restricting food too aggressively or too often can backfire.

Hormone Disruption

The female body constantly gauges whether it’s a safe time for reproduction. Prolonged calorie restriction can lower GnRH, the hormone that signals the ovaries to produce oestrogen and progesterone. The result may be irregular periods, low libido, thyroid slowdown, and disrupted mood.

Blood Sugar and Stress

Fasting raises cortisol, our stress hormone. In women juggling busy lives, high cortisol plus low blood sugar can trigger anxiety, fatigue, irritability, and even mid-afternoon crashes.

Thyroid and Adrenals

Long fasting windows can suppress T3, the active thyroid hormone, leading to slower metabolism and colder hands and feet. If you’re already experiencing low energy, it’s best to focus on balancing blood sugar before experimenting with fasting.

Too Much Autophagy, Too Little Repair

Fasting constantly without sufficient re-feeding can down-regulate mTOR activity, reducing muscle maintenance and recovery. Over time this can worsen fatigue, particularly if protein intake is low.

Remember: Autophagy is the body’s clean-up crew, not a full-time job. You need fuel to rebuild after the clean-up.

4. Fasting and the Female Cycle

Women’s tolerance for fasting shifts across the month:

  • Follicular phase (day 1 to ovulation): Oestrogen gradually rises, metabolism is more stable, and the body often copes well with slightly longer fasts (e.g. 14 hours).

  • Luteal phase (after ovulation): Progesterone increases, appetite rises, and blood sugar becomes more sensitive — meaning your body may prefer regular, protein-rich meals.

Listening to these natural fluctuations — rather than following rigid fasting rules — helps maintain hormonal balance and prevent fatigue or cycle disruption.

If your periods are irregular, you’re perimenopausal, or under significant stress, prioritising nourishment and consistency will almost always yield better results than pushing fasting harder.

5. Smarter, Safer Ways to Fast (If You Choose To)

If you’d like to explore fasting, start gently and observe how your body responds.

✔ Begin with balance:
A simple 12:12 fast (e.g. 7 pm – 7 am) gives your digestive system rest overnight without stressing your hormones.

✔ Break your fast wisely:
Always end a fast with protein, healthy fats, and fibre — for example, eggs with avocado and greens, or Greek yoghurt with nuts and berries. This stabilises blood sugar and prevents post-fast crashes.

✔ Avoid fasting on high-stress days:
If you’ve slept poorly or feel anxious, eat breakfast. Cortisol and fasting don’t mix well.

✔ Hydrate and use electrolytes:
Thirst is often mistaken for hunger; adequate hydration supports energy and cognition.

✔ Watch for warning signs:
Persistent fatigue, hair loss, poor sleep, irritability, or missed periods are cues to stop fasting and focus on nourishment.

6. When Fasting Might Be Helpful

Gentle fasting can be valuable for certain situations, such as:

  • Early signs of insulin resistance or pre-diabetes.

  • Frequent snacking and unstable energy.

  • Occasional metabolic “resets” after periods of indulgence.

However, fasting is rarely a first-line approach for women dealing with burnout, hormone imbalance, or chronic stress. In those cases, rebuilding with steady meals, balanced macronutrients, and adequate calories is the foundation of recovery.

So-what’s the answer?

Fasting is a fascinating tool — one that can trigger powerful cellular renewal through autophagy, while balanced nutrition activates mTOR for growth and repair. Both are vital. The art lies in alternating between the two with awareness, not rigidity.

For many women, the best results come from gentle overnight fasting, steady blood-sugar balance, and nutrient-dense meals that leave you energised rather than depleted.

“Support before you stress.”
Once your body feels nourished and resilient, a little fasting can become a supportive rhythm — but never at the expense of your hormones or vitality.

If you’re wondering whether fasting could support or sabotage your energy, I can help you find the right approach for your body. Click on the link below to book a free discovery call. Where we can discuss how I will help you to discover your personalised path to steady energy, balanced hormones, and long-term vitality.

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