If you’ve noticed your energy plummeting after meals, fat shifting to your midsection despite no changes to your lifestyle, or having your doctor flag your A1c (a measure of blood glucose) for the first time ever — your body is changing and you are definitely not alone!
Insulin resistance becomes more prevalent as we navigate midlife, both from menopausal reasons related to hormones, and partially from aging. What I want you to know is that it doesn’t have to do with willpower or that you’re eating “wrong.” Understanding the physiology of a woman in midlife will help you find a path forward that allows you to work with your body, rather than white-knuckling or trying harder.
What Is Insulin Resistance?
First, I’d like to give you a very brief intro to insulin. Insulin is a hormone that is made and secreted by the pancreas. Normally, when we eat food and our blood sugar levels rise, the pancreas secretes insulin. Insulin is like a key that unlocks the cells of the body so the glucose can enter the cells, give our body energy and complete many body processes. When the glucose enters the cells, our blood glucose decreases. This happens multiple times a day in the average human.
Insulin resistance occurs when the insulin that is secreted doesn’t unlock the cells as well, so the glucose levels in the blood remain high. The body then sends a signal to release even more insulin. When this process occurs, the system can get overwhelmed. What happens next is higher blood glucose, more fat storage (particularly around the midsection), more fatigue (those cells aren’t getting needed energy), and a greater risk of type 2 diabetes and cardiovascular disease.
It’s worth pointing out here that insulin resistance isn’t just about the food you are eating. As a midlife woman you are vulnerable to two distinct things: the hormonal changes of perimenopause and regular aging make insulin resistance more likely.
Let’s dive in to the nitty gritty…
Why Perimenopause Specifically Worsens Insulin Resistance
While aging in and of itself increases insulin resistance, there are specific elements of perimenopause that contribute to insulin resistance, independent of age.
Decreasing estrogen affects how the body uses glucose.
Estrogen does more than regulate your period. There are estrogen receptors throughout our bodies, in our muscle, liver and fat tissues, and they play a role in how well our body responds to insulin. As estrogen declines in perimenopause, insulin sensitivity decreases. This means that the body needs to pump out more insulin to have the same effect.
The shift towards more visceral fat changes insulin sensitivity.
A classic shift in body shape occurs in midlife: most women notice that fat distribution shifts from the hips and thighs toward greater fat in the abdomen, particularly the fat that surrounds our abdominal organs. This is called visceral fat. This shift is primarily due to declining estrogen levels, but it’s more than just a change in body shape. Visceral fat acts differently, interfering with the body’s ability to utilize insulin. In fact, research shows that postmenopausal women have a reduction of insulin sensitivity that is close to 30%. For more on how and why body composition shifts in midlife, read this.
Changes in cortisol and sleep affect insulin too.
Cortisol — often called the stress hormone — tends to rise during perimenopause. When cortisol is elevated, it signals the liver to release more glucose into the bloodstream, which directly contributes to insulin resistance.
Sleep complicates things further. I know — the irony isn’t lost on me. We know sleep matters, and yet perimenopause is exactly when it becomes elusive. What’s less often talked about is how directly disrupted sleep affects our blood sugar. Research has found that losing as little as 1.5 hours of sleep per night measurably increased insulin resistance — and the effect was more pronounced in postmenopausal women than premenopausal women. If hot flashes and night sweats are fragmenting your sleep, that’s not just a quality of life issue. It has real metabolic downstream effects.
The bottom line: the metabolic changes of perimenopause are real, they’re hormonal, and they happen to women at a rate that exceeds what aging alone would predict. This is not a reflection of what you’ve been doing wrong.
Lifestyle Strategies That Help Insulin Resistance in Perimenopause
Here’s where I want to offer a different frame than what you typically see. Most of the conversation around insulin resistance is restriction-focused and overwhelming. In my experience, that framing is both less effective and, for many women in midlife who’ve spent decades in diet culture, actively counterproductive.
What the research actually supports is a set of behaviors that add to your life — not a set of foods to eliminate or calories to count.
1. Use Your Muscles
If you’ve read any of my other articles, you’ll know that I’m a believer in the power of movement — as long as it’s on your terms. There’s no sense in committing to something you hate. But if you need a little incentive: resistance training (which can be weights, but can also be yoga, swimming, pilates, and squats) is one of the most important things we can do to combat insulin resistance in midlife. Why? Because muscle is the most significant way to soak up blood glucose after we eat.
As women in midlife, we are prone to decreasing muscle mass, both as a result of declining estrogen and aging. But taking steps to increase muscle, through both aerobic movement and resistance training, can help reverse this trend — decreasing A1c and fasting glucose. [link to one of my blogs? — Note: no exercise-specific blog published yet. Consider linking to the weight gain blog or leaving for a future movement post.]
2. Add Foods — Don’t Subtract
Often, when our A1c worsens, the first reaction might be to cut carbs. There’s enough misinformation out there to convince you of this path. But, before you go down that unsustainable spiral, I want you to know that the research points to a different plan.
Both the Mediterranean diet way of eating and the DASH diet have shown impressive results (40% reduction) in terms of reducing the incidence of diabetes. Both of these styles of eating have a common thread: eating lots of fruits, vegetables and whole grains. And before you assume that everything needs to be steamed or eaten plain: the Mediterranean style of eating uses olive oil and nuts. I know many of us were raised on plain steamed veggies in the 80s — let’s put the “punishment veggies” to bed once and for all!
Specifically, adding the following is well-researched:
- Fruits, vegetables and whole grains. The common thread here is fiber. An eating style high in fiber is associated with a lower risk of diabetes, and part of that benefit is associated with the gut microbiome. If improving digestion is on your to-do list, don’t sleep on these carbs!
- Soy foods. The data on soy foods like edamame and tofu is associated with improved utilization of insulin in postmenopausal women. Of note, the same can’t be said for soy-based supplements like protein powders and bars. The research on those products is mixed.
- Fatty fish, walnuts and flax seeds. These foods are high in omega-3 fatty acids, which has been linked to improvements in insulin resistance in women specifically. Another reason to eat fish if it’s something you enjoy!
- Nuts. Many research studies have demonstrated improved insulin markers from eating more nuts.
3. Prioritize Sleep
The greatest irony for us is that we know how much sleep matters, but it often becomes elusive in midlife. I wrote a whole article on sleep and menopause, but for the purposes of this article, I want you to know that disrupted sleep affects our insulin sensitivity — and this is particularly pronounced in postmenopause. If hot flashes and night sweats are impacting your sleep, speaking with your doctor about it is important. It’s not just a nuisance. It impacts your metabolic health.
4. Manage Stress
Sometimes stress reduction is seen as something we “should do” but most of us keep putting it off because our lives are so busy and it feels too “woo” to actually make a difference. Here’s what I want you to know: in terms of our metabolic health in midlife, dealing with stress isn’t optional.
There is current research exploring modalities like yoga and tai chi for improved insulin markers. In addition, Mindfulness Based Stress Reduction (MBSR) has shown improvements in hot flashes, anxiety, sleep quality and blood sugar in menopausal women.
Any activity you enjoy that helps you feel calmer is a win in my book. I personally love the Calm App, Peloton meditation or a yoga class. MBSR training is on my own to-do list!
5. Consider Menopause Hormone Therapy If It’s Appropriate
Prescribing medication is outside my scope as a dietitian — but this is worth knowing. MHT is currently indicated for vasomotor symptoms like hot flashes and night sweats, and research shows that estradiol may also help restore insulin sensitivity toward premenopausal levels. Not everyone can or should take it. But if symptoms are part of your picture, it’s worth raising with your provider — and walking into that conversation informed matters.
A Note on Weight and Insulin Resistance
You may have noticed that weight wasn’t one of the interventions I recommended to improve insulin resistance in menopause.
That’s because too many of us have been off and on the diet bandwagon for years, and we do know from the research that yo-yo dieting (referred to as weight cycling in the research) can make insulin resistance worse! There may be studies that show an improvement in health markers in the short term, but remember that these studies aren’t lasting long enough to show us what is happening several years later.
Fortunately, the research does show that the suggestions I made above — exercise, adding select foods, sleep, stress reduction and potentially MHT — can improve insulin resistance independent of a change in weight.
Your body doesn’t need to be smaller right now. What it needs is a focus on muscle, movement, sleep, adequate nourishment, and a break from chronic dieting.
Key Takeaways
Insulin resistance in perimenopause is driven by estrogen decline, visceral fat redistribution, cortisol dysregulation, sleep disruption, and muscle loss — not by a failure of discipline.
The most effective evidence-based responses:
- Resistance training (and combined aerobic + resistance if possible)
- Eating patterns built on addition — Mediterranean, fiber-rich, whole food
- Prioritizing and protecting sleep
- Stress management that actually works for you
- Discussing MHT with your provider if symptoms are present
None of these require you to eat less or cut out your favorite foods.
If you’re navigating the metabolic changes of perimenopause and want support that doesn’t start with a food list or a calorie target, I’d love to talk. My work is clinically informed, weight-neutral, and built around your actual life.
Not sure if we’re the right fit? Here’s a full picture of what working with a menopause dietitian actually looks like.
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