HRT and GLP-1 Weight Loss: What the 2026 Study Shows

Quick answer: HRT and GLP-1 weight loss may be linked. A 2026 study of about 3,900 midlife women found that those using hormone therapy lost significantly more weight on semaglutide, but the tirzepatide difference wasn't statistically significant. ¹ It's an observational association, not proof, and experts say HRT shouldn't be used for weight loss. ^{1 4}

Say you're 54 and on a weekly GLP-1. Your sister, who also uses an estrogen patch, seems to be losing weight faster than you. Then you see a headline saying hormone therapy makes GLP-1s work better, and you wonder whether you're missing something.

That's a fair question, and you're not alone in asking it. The Menopause Society says about one in five women aged 50 to 64 report current or past use of a GLP-1 obesity medicine, the highest share of any US age group. ¹ Midlife weight gain is common and frustrating, and it's mostly driven by aging, with menopause shifting more fat to the belly. ⁷

This guide explains what the 2026 study found and how it fits with earlier research. You'll learn why researchers think estrogen might matter, what the study can't show, what experts advise, and which questions to bring to your clinician.

Key takeaways

• In a 2026 cohort of nearly 2,400 women on semaglutide and nearly 1,500 on tirzepatide, hormone therapy use was tied to greater and sustained weight loss with semaglutide only. ¹
• An earlier Mayo Clinic study of 106 women found 16% vs 12% average weight loss at 12 months for semaglutide users with and without hormone therapy. ²
• In tirzepatide trials, women lost a similar share of weight whether they were before, during or after menopause. ³
• Both studies of hormone therapy were observational, so they can't show that the hormones caused the extra loss. ^{1 2}
• The Spanish Menopause Society and 2026 reviews say hormone therapy should be used for menopause reasons, not to add to weight loss. ^{4 5 6}

If you're on a GLP-1 and want to see your own pattern, Mirvae: Perimenopause & GLP-1 is our own iOS app, free to download, with symptom and medication journals and a dedicated GLP-1 companion.

What the 2026 study found

The 2026 study found that hormone therapy was linked to more weight loss with semaglutide, but not clearly with tirzepatide. ¹ It was presented at The Menopause Society's 2026 Annual Meeting in San Diego, held October 20 to 24, 2026. ¹

Researchers looked back at the records of midlife women treated for overweight or obesity. Everyone was over 45 with a BMI over 27. ¹ The Menopause Society describes it as the first known large real-world cohort of its kind. ¹

The press release doesn't give the size of the difference in pounds or percent. Full numbers will come with the presentation and any later paper. ¹ So if you read the headline, treat it as a direction, not a measurement you can apply to yourself.

What earlier studies found

Earlier studies point the same way for semaglutide, but they were small. The lead author said this larger cohort repeats a signal her team saw in earlier, smaller studies. ¹

The 2024 Mayo Clinic semaglutide study

The 2024 Mayo Clinic study followed postmenopausal women treated with semaglutide for at least 3 months. Only 16 were using hormone therapy and 90 were not. ² Women on hormone therapy lost more weight at every check: ²

The gap held after the researchers adjusted for other differences between the groups, and both groups improved on blood sugar, blood pressure and cholesterol markers. ² The authors said larger studies were needed, which is what the 2026 cohort tried to provide. ²

Tirzepatide by menopause stage

Tirzepatide trials asked a different question: does menopause stage change how well it works? In a look back at the SURMOUNT-1 trial, women lost an average of 26% of body weight before menopause, 23% in perimenopause and 23% after menopause, compared with 2% to 3% on placebo. ³ Average waist size dropped by 20 to 22 cm in each group, observed in the trial. ³

That analysis didn't compare hormone therapy users. It does suggest that if you're past menopause, that alone didn't blunt tirzepatide's effect in that trial. ³

Why does hormone therapy seem to help GLP-1 weight loss?

Why it happens isn't known yet. The lead author called the link biologically plausible, pointing to early lab research that suggests estrogen and GLP-1 signaling may work together. ¹ She noted the effect was stronger with semaglutide than with tirzepatide, which may point to something specific to GLP-1 signaling and needs more study. ¹

The science of midlife weight

Falling estrogen during the transition is tied to fat moving toward the middle, while muscle loss mostly reflects aging. ⁵ Women lose about 3% to 8% of muscle per decade after 30. ⁷ Hormone therapy isn't a weight-loss treatment, but it can ease hot flashes, poor sleep and mood swings, which can make healthy habits easier to keep. ⁷ It may slightly reduce belly fat and help preserve muscle, though the effects are modest. ⁷

Other explanations

If you use hormone therapy, you may differ from women who don't in ways a records study can't fully measure. You may see a clinician more often, sleep better because your hot flashes are treated, or differ in health and habits. That's why observational results need a trial before anyone can say the hormones caused the difference. ^{1 4}

What the study can't tell you

The study can't tell you that adding HRT would help your own GLP-1 work better. Here's what you still can't learn from it:

• Cause and effect. It was retrospective and observational, so it shows an association only. ¹
• Full results. These are meeting results described in a press release, not yet a full peer-reviewed paper. ¹
• Size of the effect. The release reports significance, not how many extra pounds or percent. ¹
• Which hormone therapy. Type, route and dose weren't described in the release. ¹
• A reason to use HRT for weight. The lead author said weight loss is not an indication for menopause hormone therapy. ¹

What experts say about HRT for weight loss

Experts who reviewed this evidence agree that you shouldn't use HRT just to lose more weight. The Spanish Menopause Society's 2026 position statement says the link with semaglutide is hypothesis-generating and shouldn't justify using hormone therapy solely to increase weight loss. ⁴ It also says semaglutide has the most menopause-specific evidence so far, though that evidence is limited and mostly observational. ⁴

A 2026 nursing review reached the same view: hormone therapy should be prescribed for established menopause reasons rather than for weight loss. ⁵ A 2026 clinical review in Obesity Pillars agrees, and adds that a Cochrane review of 28 trials found no effect of hormone therapy on body weight. ⁶

Hormone therapy does have approved uses. OWH lists treating moderate to severe hot flashes, preventing bone loss and relieving vaginal dryness. ⁸ Its risks, including blood clots and stroke, depend on your age, health history, and the type, dose and form you use. ⁸ For a plain look at those trade-offs, see HRT risks and benefits and estrogen patch vs pill.

What to expect on a GLP-1 at midlife

What to expect is real weight loss for most women, whether or not they use hormones. In the SURMOUNT-1 analysis, 97% to 98% of women in each menopause stage lost at least 5% of body weight on tirzepatide, versus 29% to 33% on placebo. ³ In the Mayo study, women without hormone therapy still averaged 12% loss at 12 months on semaglutide. ²

Your progress may not be a straight line, and you may have some months that are slower than others. If your weight has stalled, not losing weight on a GLP-1 covers what to track and ask. If you're worried hormones are adding pounds, does HRT cause weight gain explains what the trials found.

If you keep a dated record, you'll find these conversations easier. In Mirvae: Perimenopause & GLP-1, you can log hot flashes, sleep and mood alongside your GLP-1 notes, and weekly summaries appear once there's enough data, labeled as personal observations.

Questions to ask your clinician about HRT and GLP-1s

These questions help you use the study without over-reading it, and keep your visit focused on your own goals:

1. I'm on a GLP-1. Do I have menopause symptoms, such as hot flashes or poor sleep, that might be worth treating for their own sake?
2. If hormone therapy fits my symptoms, which type and form suits my age and health history?
3. How should we judge my GLP-1 progress, and over what time frame?
4. Are any of my other medicines, including oral hormone pills, affected by my GLP-1?
5. What side effects should I report from either medicine?

Bring a few weeks of your own notes on weight, waist, hot flashes and sleep. Your dated notes help your clinician separate a slow month from a real stall, and they help you see your progress, too.

When to see a doctor

See your doctor before making any change to a GLP-1 or hormone therapy, and bring the questions above. Talk with your clinician if weight loss stalls for months, if side effects bother you, or if menopause symptoms are getting in the way of your life. ⁸

Get emergency help right away for chest pain or pressure, shortness of breath, sweating, nausea or light-headedness. Call 911, even if you're not sure it's a heart attack, and don't drive yourself. ⁹ Women may have unusual tiredness as a heart attack sign, too. ⁹

How to track this in Mirvae

Mirvae: Perimenopause & GLP-1 is our own iOS app and is free to download. It has daily check-ins for sleep, energy, mood and stress, plus symptom and medication journals, including a dedicated GLP-1 companion. Your records stay on your device, with no account needed. It's a wellness tool, not a medical device.

To mirror this guide, log your GLP-1 day, any hormone therapy you use, and your hot flashes and sleep each day. After four weeks, you can compare your weekly summaries with your clinician.

Mirvae tracker: Start a four-week log today with one weigh-in, one waist measurement and a hot flash count. If you'd like it in one place, download Mirvae: Perimenopause & GLP-1 free on the App Store.

Part of our GLP-1 Medications: Ozempic, Wegovy, Zepbound & More guide.

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• New HRT Guidelines 2026: What ACOG and ACP Now Recommend.

FAQ

Does HRT make Ozempic work better? One large 2026 study and one smaller 2024 study linked hormone therapy with more weight loss on semaglutide, the medicine in Ozempic and Wegovy. ^{1 2} Both were observational, so they can't prove the hormones caused it.

Does HRT help tirzepatide (Mounjaro, Zepbound) work better? In the 2026 study, tirzepatide users on hormone therapy lost more weight at first, but the end difference wasn't statistically significant. ¹

Should I use hormone therapy to lose weight on a GLP-1? No. The study's lead author and the Spanish Menopause Society both say weight loss isn't a reason to use menopause hormone therapy. ^{1 4} It's used for symptoms such as hot flashes, and for bone and vaginal health. ⁸

Does menopause make GLP-1s work less well? Not in tirzepatide trials. Women lost a similar share of weight before, during and after menopause in a SURMOUNT-1 analysis. ³

When will the full study results be out? The results were presented at the October 2026 meeting. More detail usually follows in a full peer-reviewed paper, so check the date at the top of this page. ¹

Sources

• C1. The Menopause Society press release, Hormone Therapy May Increase Weight Loss Effectiveness of GLP-1s (dateline Cleveland, October 20, 2026). Dated 2026-10-20; checked 2026-11-13.
• C2. Hurtado MD et al., Weight loss response to semaglutide in postmenopausal women with and without hormone therapy use, Menopause 2024;31(4). Published 2024-04; checked 2026-11-13.
• C3. Tchang BG et al., Body weight reduction in women treated with tirzepatide by reproductive stage, post hoc SURMOUNT analysis, Obesity 2025;33. Published 2025-05; checked 2026-11-13.
• C4. Sánchez-Prieto M et al., Incretin-based therapies in peri- and postmenopausal women with obesity. Published 2026-10; checked 2026-11-13.
• C5. Lee Y, Oh B, Clinical evaluation and treatment of obesity in women across selected life stages, Womens Health Nurs 2026;32(3). Published 2026-09; checked 2026-11-13.
• C6. Younglove, Clinical review. Published 2026-06; checked 2026-11-13.
• C7. The Menopause Society MenoNote, Midlife Weight Gain. 2025; checked 2026-11-13 via curl and pdftotext.
• C8. Office on Women's Health, Menopause treatment. Page updated 2026-10-19; checked 2026-11-13.
• C9. NHLBI Heart Attack Symptoms. Last updated 2022-03-24; checked 2026-11-13.

About this page

Mirvae: Perimenopause & GLP-1 is a wellness tool, not a medical device, and does not replace professional care.

Written with AI assistance by the Mirvae Editorial Team. Not reviewed by a clinician. Educational content only, not medical advice. Talk with a qualified clinician about your own care. Mirvae does not prescribe or sell medication. In an emergency, call 911.