Let’s clarify two things. Being in perimenopause means your hormones are changing and your fertility is reducing. Being metabolically flexible means your body can use both sugar (glucose) and fat for energy and switch between the two with ease.
The key connection between them, you need one to make the other easier to handle. As a Registered Nutritional Therapist, I sit with women every week who tell me menopause has hit them like a wall: weight that won’t shift, sleep that won’t stick, energy that won’t lift, mood that won’t settle. The hormones get the blame. The fuel switch underneath them is usually the bigger lever.
If that sounds like your last few years, you don’t have to white-knuckle your way through it. You can book a free 20-minute call with me or any of the team and we’ll talk through what’s actually driving the symptoms and where to start.
Hormone haywire
Oestrogen and progesterone don’t just govern your cycle. They are deeply involved in energy metabolism, insulin sensitivity, and how your body handles glucose. Oestrogen helps your cells respond to insulin, suppresses excess glucose production in the liver, and supports a balanced cortisol response.
When oestrogen and progesterone start to fluctuate and then fall, that supportive scaffolding goes with them. Insulin sensitivity drops. Blood sugars get noisier. Belly weight creeps on for no obvious reason. And the adrenal glands, which were already busy, are now asked to pick up some of the hormonal slack.
There’s also a bidirectional relationship between oestrogen and insulin: high insulin levels disrupt oestrogen, and falling oestrogen pushes insulin up. Thyroid function shifts too, and many women are told it’s ‘just menopause’ when actually they have a thyroid pattern that deserves looking at.
If you want to see how this plays out across a whole cycle, our piece on how your menstrual cycle affects your blood sugars is a good companion read. It shows you the same fuel-switch story on a four-week timescale rather than a four-year one.
My number one tip
All women need to work on metabolic flexibility before perimenopause hits, before the fluctuating hormones are exacerbated by metabolic dysregulation, because many menopausal symptoms including hot flushes, poor sleep, fatigue and low mood are all exacerbated by insulin resistance.
The good news: loss of flexibility isn’t inevitable or permanent. Balancing blood sugars is a key step, and it is one you can start today, regardless of where you are in the perimenopausal transition.
We see this every week in clinic. Caroline came to us in her late forties with weight that wouldn’t budge, sleep that had collapsed, and a sense that her body wasn’t hers anymore. She walked the same path we’re about to describe and rebuilt her metabolic flexibility while her hormones were still shifting. The hormones didn’t have to settle first. The fuel switch came first.
Nutritional nourishment
Cut back hard on the things that drive insulin: ultra-processed foods, caffeine on an empty stomach, alcohol on a regular basis, and refined carbohydrates. Bring in whole-food diversity, protein at every meal, plenty of vegetables, healthy fats, and the slower carbohydrates your body can actually handle.
Be careful with low-fat, high-carb approaches. They are still the default advice in many places and they are exactly the pattern that pushes a perimenopausal body further into insulin resistance. If you are already a type 2 diabetic, whole grains may also be more than you can tolerate, so adjust accordingly.
If you’re not sure where to start with food, our blood sugar food guide gives you a practical day-on-a-plate template that doesn’t read like a punishment, and our control your cravings quiz is a fast way to spot which hormonal driver is pulling you toward the biscuit tin at four in the afternoon.
Make sleep priority
Poor sleep raises cortisol, which raises blood sugar, which raises insulin, which makes the next night’s sleep worse. Perimenopause hits this loop at exactly the wrong moment, with night sweats and 3am wake-ups already in the mix.
Protect a consistent bedtime, keep the room cool and dark, finish eating earlier in the evening, and watch caffeine after midday. If you keep waking at 3am and can’t get back to sleep, that’s almost always a blood sugar pattern rather than a ‘menopause is doing this to me’ pattern. Stabilising your evening glucose tends to fix it within a fortnight, and it’s one of the first things we work on inside our blood sugar and insulin resistance programme.
Make time for movement
Movement is the only thing other than insulin that can get glucose into the cell. Walking after meals, lifting something heavy a few times a week, and breaking up long sitting periods all improve insulin sensitivity. You don’t need a brutal regime, you need a consistent one.
If you’re losing oestrogen, you’re losing muscle. That’s not a fitness preference, it’s the biology. Our piece on more muscle for better blood sugars and longevity explains why strength work in your forties and fifties is one of the highest-leverage things you can do for the next thirty years, and our blood sugar walking guide gives you the simple post-meal walk protocol if lifting weights isn’t where you want to start.
Put the spotlight on stress reduction
Cortisol drives blood sugar up directly. So a stressful week, even with the best diet in the world, can read on a glucose monitor like a week of biscuits. Time in nature, breath work, journaling, a long bath, anything that gives the nervous system a signal of safety, all of it helps.
Perimenopause is also a stage of life where stress is structural, not occasional: teenagers, ageing parents, mid-career squeeze, the lot. The point is not to remove it, the point is to give the body a chance to come back down between waves. Dervilla’s story on our success page is a good example of how rebuilding nervous-system capacity changed her menopause more than any single supplement did.
Key take home
We have the ability to maintain and increase metabolic flexibility in spite of our age and hormones because it is influenced by modifiable lifestyle factors that we can influence, what we eat, how we sleep, how often we move and how we chill out.
Three ways to take the next step, depending on how much support you want.
Start free. Take our control your cravings quiz to spot which hormonal driver is steering your appetite, and grab the blood sugar walking guide for the simplest after-meal habit that moves the needle.
Test before you guess. A wellness check gives you the lab picture of where your blood sugars, insulin and key metabolic markers actually sit, so you stop treating symptoms in the dark.
Work with us 1-1. If you want a clinician walking the road with you, our blood sugar and insulin resistance programme is built for exactly the perimenopausal pattern this article describes. Or book a free 20-minute call and we’ll help you choose between the rungs.
Start living life with more energy, vitality and zest than you’ve felt in a long time.
