Perimenopause: what’s happening and how food can help
During perimenopause, levels of oestrogen and progesterone fluctuate rather than decline in a smooth line. These hormonal shifts affect neurotransmitters like serotonin and GABA, as well as blood glucose regulation and the stress response. This is why foods you used to tolerate well can suddenly trigger bloating, reflux or energy crashes, and why mood can feel more reactive.
Hormone therapy decisions should always sit with your GP or specialist. Nutrition and lifestyle support won’t replace HRT, but they can work alongside it. Many women notice more stable mornings, fewer energy dips, and better resilience when daily habits support physiology.
Protein, plants, and a steady meal rhythm
A consistent eating pattern helps regulate glucose and cortisol. For many people, three structured meals work better than constant grazing.
Aim for:
- Adequate protein at each meal (to support muscle mass, satiety, and stable blood sugar)
- Fibre-rich plant foods (to support the gut microbiome and oestrogen metabolism via the estrobolome)
- Smart use of carbohydrates (spacing starches to avoid sharp rises and drops in blood glucose)
This combination supports more stable insulin signalling and can reduce that mid-afternoon “crash” feeling.
Sleep also matters more than most people expect. Late nights disrupt circadian rhythms and increase cortisol, which in turn affects appetite, glucose control, and mood the next day.
Stress shows up in the gut first
The gut and brain are closely linked through the vagus nerve and the hypothalamic-pituitary-adrenal (HPA) axis. When the nervous system is constantly “on,” digestion often suffers first.
You might notice:
- Bloating
- Reflux
- Irregular bowel habits
Simple habits such as slow breathing, eating without distractions, and stepping away from screens at meals can improve vagal tone and support digestion. They may feel small, but physiologically they help shift the body from “fight or flight” into “rest and digest.”
When testing can be helpful
If symptoms like hot flushes, poor sleep, anxiety, and irregular cycles start to stack up, targeted testing can sometimes provide useful insights.
Tests such as the DUTCH test may help assess hormone metabolites and patterns of cortisol output across the day. However, testing should only be used when it will guide decisions, not as a default starting point.
A thorough conversation always comes first, followed by selective testing if it adds value.