The short version
- "Cortisol belly" is a popular phrase, not a medical diagnosis.
- One long-running study found that overnight cortisol rose in women entering the late stage of the menopause transition.
- In that study, the women whose cortisol rose had worse hot flashes. They did not report more stress, and they were not heavier.
- The body changes of menopause are better explained by falling estrogen and muscle loss than by cortisol alone.
- Truly high cortisol is a medical condition called Cushing's syndrome. It has distinctive signs and needs testing by a doctor, not a supplement.
What cortisol is
Cortisol is a hormone made by the adrenal glands, which sit on top of your kidneys. You need it to live. It helps you wake up, keeps blood sugar and blood pressure steady, and helps you respond to illness and stress.
Your level is not constant. It is highest shortly after you wake and lowest around midnight. Any claim about "high cortisol" has to deal with that daily swing, which is one reason a single test tells you so little.
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What studies of midlife women found
The main evidence comes from the Seattle Midlife Women's Health Study. Women collected urine samples every month for years while researchers tracked their cycles and symptoms.
In 2006 the team reported that overnight cortisol rose as women moved into the late stage of the transition, the phase when periods become far apart. There was no similar jump at the middle stage or around the final period.1
The details matter more than the headline.
- The women whose cortisol rose had more severe hot flashes.
- They did not differ from the other women in body mass index, age, exercise, mood, sleep or reported stress levels.1
A follow-up analysis looked for what else might drive cortisol in these years, including hormones, symptoms, and social and health factors.2 Taken together, the rise looks tied to the late transition itself more than to how stressed the women said they felt.
So what does cause the belly change?
The strongest evidence points to estrogen and muscle. In a large US study that scanned women repeatedly through the transition, fat gain doubled in speed and lean mass began to fall when the transition started, and both leveled off about two years after the final period.3
That pattern follows the timing of ovarian hormone changes closely. It is covered in detail in our guide to menopause belly fat.
Stress still matters, in an ordinary way. When you are stressed and short of sleep you tend to move less, snack more and drink more alcohol. Those habits add fat with or without a measurable change in cortisol.
When high cortisol is a medical problem
There is a condition in which cortisol really is too high for a long time. It is called Cushing's syndrome. The most common cause is long-term use of steroid medicines such as prednisone. Less often, a tumor makes the body produce too much cortisol.6
Cushing's syndrome does cause weight gain around the middle, but it comes with other signs that ordinary menopause does not.6
| More typical of menopause | Signs that suggest Cushing's syndrome |
|---|---|
| Gradual thickening of the waist over years | Weight gain in the face, upper back and belly while arms and legs stay thin |
| Hot flashes and night sweats | Wide purple stretch marks on the belly, thighs or breasts |
| Periods becoming irregular, then stopping | Skin that bruises very easily and heals slowly |
| Strength falls slowly if you do not train | Marked weakness in the thighs and upper arms, such as trouble standing from a chair |
If you recognize the right-hand column, or you take steroid tablets, injections or strong steroid creams, see your doctor. Do not stop a prescribed steroid on your own. Stopping suddenly can be dangerous.
What helps, cortisol or not
You do not need to measure a hormone to act on the things that are known to work.
- Train regularly. Across 101 randomized trials, exercise reduced waist size and visceral fat in postmenopausal women and increased muscle.4 Start with our illustrated strength routine.
- Treat hot flashes. Cortisol and hot flash severity moved together in the Seattle study.1 Hot flashes are treatable, with and without hormones. Cognitive behavioral therapy and clinical hypnosis are both recommended by The Menopause Society.5 See hot flash treatments without hormones.
- Keep a steady sleep window. Go to bed and get up at the same times, keep the bedroom cool, and stop caffeine by early afternoon.
- Go easy on alcohol. It fragments sleep and adds calories with no protein or fiber.
- Eat enough. Crash diets strip muscle. See the menopause food list.
What to be skeptical about
- "Cortisol detox" plans and drinks. Your body clears cortisol on its own every day.
- Home saliva kits sold with a supplement plan. A reading without a medical reason and proper timing cannot tell you whether anything is wrong.
- Advice to stop strength training "because it spikes cortisol". The trial evidence shows training improves body composition after menopause.4
Common questions
Should I get my cortisol tested?
Not as a routine check for belly fat. Cortisol swings widely through the day, so a single reading means little. Doctors test cortisol when your symptoms suggest a specific condition such as Cushing's syndrome, and they use particular tests done at particular times.
Do cortisol-lowering supplements work for menopause belly?
We have not found good-quality trials showing that any supplement sold to lower cortisol reduces abdominal fat in menopausal women. The Menopause Society also does not recommend supplements or herbal remedies for hot flashes.
Does hard exercise raise cortisol and make things worse?
Cortisol rises briefly during any demanding workout and then settles. That short rise is normal. Across more than a hundred trials, exercise reduced waist size and deep abdominal fat in postmenopausal women, so do not avoid training out of worry about cortisol.
References
- Woods NF, Carr MC, Tao EY, Taylor HJ, Mitchell ES. Increased urinary cortisol levels during the menopausal transition. Menopause. 2006;13(2):212-221. https://pubmed.ncbi.nlm.nih.gov/16645535/
- Woods NF, Mitchell ES, Smith-DiJulio K. Cortisol levels during the menopausal transition and early postmenopause: observations from the Seattle Midlife Women's Health Study. Menopause. 2009;16(4):708-718. https://pmc.ncbi.nlm.nih.gov/articles/PMC2749064
- Greendale GA, Sternfeld B, Huang M, et al. Changes in body composition and weight during the menopause transition. JCI Insight. 2019;4(5):e124865. https://doi.org/10.1172/jci.insight.124865
- Khalafi M, Habibi Maleki A, Sakhaei MH, et al. The effects of exercise training on body composition in postmenopausal women: a systematic review and meta-analysis. Front Endocrinol. 2023;14:1183765. https://pubmed.ncbi.nlm.nih.gov/37388207/
- The 2023 nonhormone therapy position statement of The North American Menopause Society. Menopause. 2023;30(6):573-590. https://pubmed.ncbi.nlm.nih.gov/37252752/
- National Institute of Diabetes and Digestive and Kidney Diseases. Cushing's syndrome. https://www.niddk.nih.gov/health-information/endocrine-diseases/cushings-syndrome
Every health claim above links to its source. Before publication the article was read and approved by Claudia Muresian, health psychologist, fitness coach and healthy nutrition specialist. It is general information and cannot take your personal history into account, so use it to prepare for a conversation with your own clinician.
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