Perimenopause: Nutrition for Hormone Balance

There is often a moment when women realise something has shifted.  They start waking at 3am for no obvious reason. Their usual exercise routine suddenly feels more exhausting than it did before. Their patience is shorter, their periods are heavier or closer together, and the weight that once felt ok now seems to have settled around their middle overnight.

I often hear from clients that they feel as though their body doesn’t belong to them anymore. 

They are eating the same way they always have, and yet they feel more tired, more anxious and far less resilient. They may have gone to the GP after months of fatigue and brain fog only to be told their blood tests are “normal”. They sometimes start wondering if they are simply failing to cope.

But for many women, these changes are not random - they may just be the start of perimenopause.

And despite what social media often suggests, perimenopause is not just about hot flushes. It can affect sleep, mood, blood sugar balance, energy, muscle mass, appetite, stress resilience, cognitive function and metabolic health long before periods stop completely.

The good news is that nutrition and lifestyle can make a significant difference to how women experience this transition.

What Actually Happens During Perimenopause?

Menopause is when you have been 12 months without a period. Perimenopause is the stage leading up to this where hormone levels begin to fluctuate dramatically. The average age of menopause is 51, but perimenopause can last 4-10 years, so changes post-40 might be the start of perimenopause. 

In perimenopause, symptoms often feel confusing and that’s because hormones do not simply decline in a straight line. Oestrogen can swing from high to low unpredictably, while progesterone often declines earlier due to less regular ovulation. This hormonal instability may explain why symptoms can appear suddenly or change month to month.

One month you may feel completely fine.

The next you may feel exhausted, anxious, bloated and unable to sleep.

Emerging research also shows that perimenopause is closely linked with changes in metabolic health. Fluctuating oestrogen levels can affect insulin sensitivity, appetite regulation and body fat distribution, particularly around the abdomen. At the same time, declining oestrogen may influence inflammation, vascular health and cognitive function. 

This is one reason why many women say: “I feel like I’ve suddenly aged overnight.”

In reality, there are complex hormonal and metabolic shifts happening beneath the surface.

Why Symptoms Often Feel Confusing
Perimenopause symptoms overlap with many other issues including thyroid dysfunction, iron deficiency, burnout, chronic stress and poor sleep.

Symptoms may include:

• Fatigue
• Brain fog
• Anxiety or low mood
• Reduced stress tolerance
• Weight gain
• Irregular or heavier periods
• Poor sleep
• Joint aches
• Increased cravings
• Digestive changes
• Hot flushes or night sweats

Many women spend years trying to “push through”, often assuming they simply need more discipline, more motivation or another diet. But this can sometimes make things worse.

In reality, many women in their 40s are carrying an enormous physiological load. They are often balancing careers, children, ageing parents, poor sleep and chronic stress while simultaneously navigating hormonal shifts that affect how their body regulates energy, appetite and recovery.

Mood, Sleep and Energy Changes

One of the earliest changes many women notice is disrupted sleep.

Progesterone naturally has calming and sleep-supportive effects. As progesterone levels begin to fluctuate and decline, women may become more sensitive to stress and less able to switch off at night.

Research also suggests that changing hormone levels during perimenopause can influence neurotransmitters involved in mood regulation, including serotonin and GABA pathways, causing feelings of irritability and anxiety.

In turn, poor sleep itself can then worsen cravings, blood sugar instability and fatigue. This creates a cycle where women feel increasingly exhausted but are often told to simply “manage stress better”.

I also commonly see women becoming more reactive to caffeine and alcohol during this stage. Foods and habits they once tolerated perfectly well suddenly affect sleep, anxiety or energy far more significantly.

Weight Gain and Blood Sugar Changes

One of the most frustrating aspects of perimenopause for many women is feeling as though their metabolism has changed overnight.

Women often tell me: “I’m eating less than I used to, but gaining more weight than ever.”

While nutrition still matters enormously, this is not simply about calories or willpower. Perimenopause is associated with changes in insulin sensitivity, muscle mass and fat distribution. Oestrogen fluctuations appear to influence where fat is stored, particularly around the abdomen, while poor sleep and chronic stress may increase cravings and appetite dysregulation.

At the same time, many women unintentionally under-eat protein, skip meals or rely on quick ultra-processed foods because they are overwhelmed and exhausted.

This is often why extreme dieting approaches backfire during midlife. Restrictive diets may temporarily reduce weight but can worsen stress, cravings, muscle loss and energy long term.

Nutrition Strategies That Support Hormone Balance

There is no single “perfect” perimenopause diet.

However, evidence increasingly supports Mediterranean-style dietary patterns rich in fibre, healthy fats, plant diversity and adequate protein for supporting cardiovascular, metabolic and cognitive health during midlife. Rather than focusing on restriction, I like to encourage women to think about nourishing their bodies, building resilience and trying to maintain consistency.

Prioritising Protein

Protein becomes increasingly important during midlife. Adequate protein supports muscle maintenance, blood sugar balance, satiety and recovery.

Many women are unknowingly under-eating protein, particularly at breakfast, which may contribute to energy dips and cravings later in the day.

Useful protein-rich foods include:

• Eggs
• Greek yoghurt
• Fish
• Chicken or turkey
• Lean red meat
• Tofu and tempeh
• Lentils and beans
• Nuts and seeds

Supporting Blood Sugar Balance

Blood sugar fluctuations can become more noticeable during perimenopause. Many women describe feeling “hangry”, shaky or desperate for sugar by mid-afternoon.

Simple habits can make a significant difference:

• Eating 3 regular meals each day
• Including protein and fibre at every meal
• Reducing reliance on ultra-processed snacks
• Avoiding skipping meals
• Building meals around whole foods where possible

Women often notice improvements in energy, cravings and mood stability when blood sugar becomes more consistent.

Increasing Fibre and Plant Diversity

Higher fibre diets are associated with improved gut health, cardiovascular health and metabolic function. Plant diversity also supports the gut microbiome, which may play a role in hormone metabolism through the so-called “estrobolome”. 

This does not mean women need to eat perfectly.

But regularly including foods such as vegetables, berries, herbs, nuts, seeds, beans and whole grains where tolerated may provide important support during this stage of life.

Including Healthy Fats

Healthy fats are essential for hormone production, brain health and inflammatory balance. Useful sources include:

• Extra virgin olive oil
• Oily fish
• Walnuts
• Chia seeds
• Flaxseeds
• Avocado