Hormones
Perimenopause and Blood Sugar: What Changes and What Helps
Your blood sugar can behave differently in your forties, and it is not all in your head. Here is what actually shifts, what the studies can and cannot say, and the simple levers that work.
If your energy, cravings, or afternoon crashes feel different in your forties, perimenopause and blood sugar may be part of the story. During the menopause transition, the body tends to handle glucose a little less smoothly than it used to. That shift is real and it is measurable. It is also something you have more say over than the internet suggests. If the cravings are the part that bothers you most, we scored five products in our ranking of supplements for perimenopause sugar cravings.
Here is what actually changes, what the research can and cannot tell you, and the few habits with real evidence behind them.
What happens to blood sugar in perimenopause
A clinical guide from the European Menopause and Andropause Society pulled together the research on menopause and diabetes. It describes the transition as a time when fat moves toward the belly, daily energy use drops, and the body both releases insulin less well and responds to it less well. Together, those changes raise the risk of type 2 diabetes (Slopien, 2018).
The same guide is honest about a debate that is still open: how much of this comes from menopause itself, and how much comes from getting older at the same time. For you, the answer changes less than you might think. The shift is happening in these years either way, so these are the years to pay attention.
If you want the bigger picture on the body changes behind this, our guide to what really changes in your metabolism during perimenopause separates the myths from the measurable parts.
Can perimenopause cause high blood sugar?
It can push it up, usually slowly and quietly. Most women will not feel a rising fasting glucose. There is no dramatic symptom that tells you insulin is working a little harder than it did five years ago.
That is why a simple blood test at your yearly checkup is worth asking for. A fasting glucose or an A1C gives you a baseline, so later numbers mean something. If you want to understand what those results are actually measuring, our explainer on what insulin resistance is and how it is found walks through it without the fear.
Can perimenopause cause low blood sugar?
This is one of the most common questions, and the honest answer is that it has not been studied well. Plenty of women describe sudden spells of shakiness, sweating, a racing heart, or urgent hunger in their forties.
The trouble is that those same feelings overlap with hot flashes, anxiety, and short sleep, all of which are common in perimenopause. Without a test at the moment it happens, it is very hard to know which one you are feeling. True low blood sugar in women without diabetes is uncommon.
If these spells keep happening, keep a short log: the time, how long it lasted, and what and when you last ate. That record is far more useful to your doctor than a guess, and it helps rule out other causes that are worth catching.
Does perimenopause cause insulin resistance?
Insulin sensitivity tends to slip during the transition, which is the heart of the answer above (Slopien, 2018). Insulin resistance means your cells respond less to insulin, so your body has to make more of it to keep glucose in range.
One newer finding from the Study of Women's Health Across the Nation (SWAN) adds an interesting twist. Researchers looked at 704 women with fasting insulin measured at age 47. Those with higher insulin went on to have hot flashes and night sweats that started earlier and lasted longer. The link held even after accounting for body size and glucose (Athar, 2026).
That is an observational finding, so it shows a connection, not that high insulin causes hot flashes. It does suggest that metabolic health and menopause symptoms are more tied together than most of us were told.
Hot flashes and blood sugar: the link runs both ways
A very large study points the same direction from the other side. Researchers followed 150,007 postmenopausal women in the Women's Health Initiative for an average of 13 years. Women who reported hot flashes or night sweats had an 18 percent higher risk of developing diabetes, and the risk climbed with more severe symptoms. Night sweats showed a stronger link than hot flashes alone (Gray, 2018).
Two details matter here. The link held regardless of weight. And it showed up for symptoms that continued after menopause, not for symptoms that happened only in perimenopause. Again, this is a connection seen across a large group, not proof of cause, and most women with hot flashes will never develop diabetes.
The practical takeaway the authors offer is a kind one: bothersome symptoms can be a good moment to look at the longer view with your doctor. For the symptom side itself, see our guide to what actually helps with hot flashes.
Sleep is the lever most women skip
Perimenopause is famous for broken sleep, and sleep has a direct line to blood sugar.
In a randomized trial, 38 women who normally slept seven to nine hours cut back by about 1.5 hours a night for six weeks, down to roughly 6.2 hours. Their fasting insulin and insulin resistance both rose compared with the weeks they slept normally. The effect was stronger in the postmenopausal women in the group, and it happened without any change in body fat (Zuraikat, 2024).
That kind of mild short sleep is exactly what night sweats and 3 a.m. waking produce. Protecting sleep is not a luxury in these years. It is part of blood sugar care. Our piece on how sleep and cortisol shape midlife weight covers practical ways to get more of it.
What helps: simple habits with real evidence
Eat your protein and vegetables first. In a small study of 15 adults with prediabetes, eating protein and vegetables ten minutes before the carbohydrate part of the same meal cut the post-meal glucose peak by more than 40 percent and made the curve much steadier (Shukla, 2018). Same food, different order. It is one of the easiest changes you can make at dinner tonight.
Break up long sits with an easy walk. A review of seven trials found that short, light walking breaks during long periods of sitting lowered post-meal glucose and insulin, and worked better than simply standing up (Buffey, 2022). You do not need a workout. A slow few minutes around the house or down the street counts.
Keep building fiber and protein into meals. Our simple, no-fear guide to blood sugar balance covers the everyday version of this, including what glucose monitors can and cannot tell someone without diabetes.
Lift something. Muscle is where much of your glucose goes after a meal, and women lose muscle faster in these years. Two or three strength sessions a week is a reasonable target.
Does hormone therapy help blood sugar?
Women ask this a lot, so here is the straight version.
In the Women's Health Initiative hormone trial, 15,641 postmenopausal women aged 50 to 79 took either combined estrogen and progestin or a placebo for about 5.6 years. Treated diabetes developed in 3.5 percent of the hormone group and 4.2 percent of the placebo group, a 21 percent lower risk. Insulin resistance also dropped in the first year (Margolis, 2004).
Even so, the American Association of Clinical Endocrinologists says hormone therapy is not recommended to prevent diabetes (Cobin, 2017). It is prescribed to treat menopause symptoms, and whether it suits you depends on your age, time since your last period, and your own risks. If symptoms already have you considering it, the blood sugar findings are one more thing to discuss. They are not a reason to start it on their own.
When to talk to your doctor
Ask for a fasting glucose or A1C at your next checkup if you have not had one recently, especially if diabetes runs in your family, you had gestational diabetes, or your waist has grown in the last few years. See your doctor sooner for strong thirst, frequent urination, blurry vision, or spells that feel like low blood sugar and keep coming back.
For more on how hormones and metabolism fit together, browse our hormones and metabolism guides.
The bottom line
Perimenopause and blood sugar are genuinely linked. Insulin tends to work a little less well through the transition, and hot flashes and short sleep seem to travel with that shift. None of it is a verdict. Protein and vegetables first, short walks, strength work, and protected sleep are small, doable habits, and they are the ones the research actually supports.
This article is for general education and is not medical advice. Talk with your doctor before changing your diet, exercise, or medications, especially if you have diabetes, prediabetes, or another medical condition. Research cited was retrieved from PubMed.
References
- Slopien R, et al. Menopause and diabetes: EMAS clinical guide. Maturitas. 2018. PMID: 30314563
- Athar F, et al. Insulin levels early in perimenopause inform vasomotor symptom incidence across the menopausal transition. Journal of Clinical Endocrinology and Metabolism. 2026. PMID: 41482729
- Gray KE, et al. Vasomotor symptom characteristics: are they risk factors for incident diabetes? Menopause. 2018. PMID: 29206771
- Zuraikat FM, et al. Chronic insufficient sleep in women impairs insulin sensitivity independent of adiposity changes: results of a randomized trial. Diabetes Care. 2024. PMID: 37955852
- Shukla AP, et al. The impact of food order on postprandial glycaemic excursions in prediabetes. Diabetes, Obesity and Metabolism. 2018. PMID: 30101510
- Buffey AJ, et al. The acute effects of interrupting prolonged sitting time in adults with standing and light-intensity walking on biomarkers of cardiometabolic health in adults: a systematic review and meta-analysis. Sports Medicine. 2022. PMID: 35147898
- Margolis KL, et al. Effect of oestrogen plus progestin on the incidence of diabetes in postmenopausal women: results from the Women's Health Initiative Hormone Trial. Diabetologia. 2004. PMID: 15252707
- Cobin RH, et al. American Association of Clinical Endocrinologists and American College of Endocrinology position statement on menopause: 2017 update. Endocrine Practice. 2017. PMID: 28703650
Common questions
Can perimenopause cause high blood sugar?
Perimenopause can nudge blood sugar up. A European clinical guide from menopause specialists describes the transition as a time when fat shifts toward the belly, energy use drops, and both insulin release and insulin sensitivity get worse, which raises the risk of type 2 diabetes (Slopien, 2018). Experts still debate how much of that is menopause itself and how much is simply getting older. Either way, it is a good time to ask for a fasting glucose or A1C at your regular checkup.
Can perimenopause cause low blood sugar symptoms?
Many women describe shaky, sweaty, sudden-hunger spells in their forties, but this has not been studied well. Those same feelings overlap with hot flashes, anxiety, and poor sleep, so it is hard to tell them apart without a test. True low blood sugar in women without diabetes is uncommon. If it keeps happening, note the time and what you last ate, and bring that log to your doctor.
Does perimenopause cause insulin resistance?
Insulin sensitivity tends to decline across the menopause transition, according to a clinical guide from the European Menopause and Andropause Society (Slopien, 2018). In the SWAN study, women with higher fasting insulin at age 47 went on to have earlier and longer lasting hot flashes (Athar, 2026). That is a link, not proof that one causes the other.
Does hormone therapy lower blood sugar?
In the Women's Health Initiative trial of 15,641 postmenopausal women, 3.5 percent of those on combined hormone therapy developed treated diabetes over about 5.6 years, compared with 4.2 percent on placebo (Margolis, 2004). Even so, endocrinology guidelines say hormone therapy should not be used to prevent diabetes (Cobin, 2017). It is a treatment for symptoms, and the choice depends on your own health history.
What is the best way to eat for steadier blood sugar in perimenopause?
Start with the order of your plate. In a small study of adults with prediabetes, eating protein and vegetables ten minutes before the carbohydrate part of the same meal lowered the glucose peak by more than 40 percent (Shukla, 2018). Add a short, easy walk after sitting for a long time, since light walking breaks lowered post-meal glucose and insulin in a pooled analysis of seven trials (Buffey, 2022).
