Blood Sugar and Menopause: Why your body responds differently in midlife
If you are navigating perimenopause or menopause right now, you’ve probably heard a lot about hormones. You may be expecting to feel more “hormonal”, and you might be bracing yourself for irregular periods and hot flushes.
But what many women don’t expect is that their bodies can suddenly seem to change the rules. The way you respond to food can change. Your energy can feel less predictable, your weight and body shape may alter, and you might find yourself dealing with brain fog, changes in mood or joints that suddenly feel much stiffer than they used to.
As a menopause nutritionist, I speak to women every day who are incredibly frustrated. They tell me, “I’m eating the same way I always have, but suddenly I’m dealing with stubborn belly fat, I’m tired all the time, I experience bouts of anxiety and my joints ache the second I get out of bed.”
We often assume that everything we experience during menopause is simply down to changing or falling oestrogen. And whilst hormonal changes certainly play an important role, there are other changes happening in the body during midlife too.
One that I think we should be talking about much more is the relationship between blood sugar and menopause.
To be clear, I’m not saying that balancing your blood sugar is a magic bullet that will fix every menopause symptom. It won’t. But supporting healthy blood sugar and insulin sensitivity is an important foundational piece of the midlife health puzzle.
And that is why it sits at the core of all my group and personalised nutrition programmes.
What Happens to Blood Sugar During Menopause?
Oestrogen does much more than regulate your menstrual cycle. It also plays a role in how your body responds to insulin and manages blood sugar.
When you eat carbohydrates, they are broken down into glucose, which enters your bloodstream. Your pancreas responds by releasing insulin, a hormone that helps move glucose out of your bloodstream and into your cells, where it can be used for energy.
Think of insulin as a key that helps unlock your cells, allowing glucose to move out of your bloodstream and into your cells where it can be used for energy.
As oestrogen fluctuates and eventually declines through perimenopause and menopause, that lock can become a little more “rusty”. The key still works, but it may take more insulin to get the same job done. This reduced response to insulin is what we mean by insulin resistance.
In response, your pancreas produces more insulin to help keep your blood sugar within a healthy range. Over time, if insulin resistance increases, blood glucose levels can begin to rise too.
But changing oestrogen isn’t the only factor.
As we move through midlife, we also naturally tend to lose muscle, and the hormonal changes of menopause may contribute to changes in muscle mass and strength too.
This matters because muscle is one of the main places glucose is taken up and used. The less muscle we have, the less capacity we have to clear glucose from the bloodstream, another reason why maintaining muscle becomes increasingly important in midlife.
Sleep, stress and activity levels can also affect how sensitive our cells are to insulin, and these are often changing at exactly the same time as our hormones.
Put all of this together and it helps explain why the way you ate and lived in your 30s may not work quite as well for you in your 40s and 50s.
You don't necessarily need to eat less. But you may benefit from eating differently.
What Are the Signs of Blood Sugar Changes in Menopause?
Changes in blood sugar and insulin sensitivity don't affect everyone in the same way, and they aren't responsible for every symptom you experience during menopause. But supporting steadier blood sugar may help with several of the things women commonly struggle with in midlife.
Energy dips and fatigue
Blood sugar that rises quickly and then falls can leave you feeling tired and low in energy, particularly after meals or during that familiar mid-afternoon slump.
Brain fog and poor concentration
Fluctuating blood sugar can affect concentration and mental energy, leaving you feeling foggy or struggling to focus.
Hunger and cravings
Sharp rises and falls in blood sugar can leave you hungry again soon after eating and craving something sweet or another coffee to pick you back up.
Mood and anxiety
When blood sugar drops, your body can release stress hormones such as adrenaline and cortisol to help bring it back up. For some women, this can contribute to feeling shaky, irritable or anxious.
Weight around the middle
Declining oestrogen changes where we tend to store fat, with more being stored around the middle. Reduced insulin sensitivity can add another layer to this and make weight management more challenging.
Sleep
Sleep and blood sugar have a two-way relationship. Poor sleep can reduce insulin sensitivity the following day, while keeping your meals balanced and your blood sugar steadier can support overall metabolic health.
Aches and joint pain
Joint pain has many causes during menopause and blood sugar isn't necessarily the cause. However, insulin resistance and persistently raised blood sugar are associated with increased inflammation, so supporting overall metabolic health may be helpful.
Hot flushes and headaches
Hormonal changes are major drivers of hot flushes and can also contribute to headaches and migraines. Blood sugar fluctuations may make some women feel worse, although they aren't necessarily the underlying cause.
The point isn't that balancing your blood sugar will make all of these symptoms completely disappear. But supporting steadier blood sugar may help improve some of them, while giving your body a stronger foundation for managing the changes that happen through menopause.
How to Support Healthy Blood Sugar During Menopause
A few simple changes can make a difference:
Include protein at every meal
Protein helps keep you satisfied and, when eaten alongside carbohydrates, can help create a more balanced meal. Think eggs, Greek yoghurt, fish, chicken, tofu, beans and lentils.
Choose fibre-rich carbohydrates
Include foods that are high in fibre such as vegetables, fruit, beans, lentils and wholegrains, and choose less refined carbohydrates more often.
Pair your carbohydrates
Rather than eating carbohydrates on their own, combine them with protein, fibre and healthy fats. Think toast with eggs, fruit with Greek yoghurt and nuts, or potatoes with salmon and vegetables.
Move after meals
Your muscles use glucose for energy, so even a short walk after eating can help your body manage blood sugar more effectively.
Think beyond food
Sleep, stress and maintaining muscle all influence how sensitive your body is to insulin. Prioritising sleep, finding ways to manage stress and including some strength training all help support healthy blood sugar.
These simple changes may seem small, but put together they can make a real difference to your energy, appetite, metabolic health and ability to manage your weight through midlife.
Want Some Help Putting This Into Practice?
Blood sugar balance is one of the foundations of my Midlife Nutrition Reset, where I show you how to put these principles into practice across your whole day.
The next Midlife Nutrition Reset starts on Monday 14th September.
Over 14 days, we focus on simple, realistic changes to your meals, movement, sleep and daily routines to help support your energy, appetite, digestion and weight through midlife.
You don't need to count calories or follow a restrictive diet. The aim is to help you understand what works for your body and give you habits you can continue long after the programme finishes.
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