Does HRT Help With Weight Loss? Understanding the Science Behind Hormone Therapy

Article Summary

• During perimenopause and menopause itself, physiological, hormonal and metabolic changes mean that weight loss may be more challenging.
• Hormone Replacement Therapy (HRT) manages menopausal symptoms and its influence extends to metabolic health and body composition.
• A healthy lifestyle including a nutritious diet and exercise, stress management and sleep are key. GLP-1s may also play a role in weight management.

Navigating menopause might feel overwhelming at first, especially if you’re actively working towards a weight loss goal.The metabolic shifts and physical changes associated with menopause can make weight loss feel more challenging, despite your best efforts with diet and exercise.

Understanding the underlying science and exploring treatment options can help you move through this stage with more confidence and fewer side effects.

Our experts explain how menopause could impact weight loss, the possible role of Hormone Replacement Therapy (HRT) to support weight loss and the impact of GLP-1 medications on your metabolic health.

Menopause and weight loss

The menopausal transition is marked by declining oestrogen and progesterone levels, leading to a host of physical and emotional changes.[1]

As oestrogen production declines, it can trigger a shift in your body composition. The body's fat distribution patterns change, with an increased likelihood of fat storage around the abdomen. [2]

A decrease in oestrogen can also influence insulin sensitivity, making it harder for your body to use sugar (glucose) for energy effectively, which can make weight loss feel more challenging. [3]

For lots of people, traditional weight loss strategies that once worked can feel less effective, which is why many look to new, science-backed approaches.

Changes in your metabolic rate

Following menopause, it’s common to experience a decrease in your Basal Metabolic Rate (BMR), which is the number of calories the body burns at rest. This slow-down means that eating the same amount as before can mean taking in more energy than you need, which can cause weight gain. [4]

Age-related loss of muscle mass can also contribute to this metabolic slow-down. Muscle tissue is more ‘metabolically active’ than fat tissue, meaning it burns more calories even at rest. As muscle mass reduces, the BMR further decreases. [5]

This cycle of reduced muscle mass and slower metabolism makes weight loss more challenging and weight gain more likely.

Lifestyle factors challenging weight loss

Beyond the direct hormonal and metabolic changes, lifestyle factors can significantly challenge your ability to achieve weight loss during menopause.

Changes in sleep patterns, including insomnia and night sweats, are common menopausal symptoms that disrupt energy levels and can lead to increased cravings for calorie-dense foods. [6]

Stress, which can be amplified during this life for various reasons, can also lead to increased cortisol levels, promoting abdominal fat storage.

Feeling less motivation towards physical activity due to fatigue or joint discomfort can also reduce calorie expenditure, and combined with the underlying changes going on within the body, can disrupt your weight loss goals.

What is HRT? Understanding oestrogen and progesterone therapy

HRT involves taking hormones, typically oestrogen, to supplement the body's declining natural production. Its primary purpose is to help relieve menopausal symptoms like hot flushes, night sweats, vaginal dryness and mood swings.

In those who still have their uterus, progesterone is usually prescribed alongside oestrogen to protect the uterine lining.

There are many different HRT options, including pills, patches, gels, sprays, and vaginal inserts, helping you develop a personalised treatment plan.

Does HRT cause weight loss?

HRT prescriptions have seen a notable rise, increasing 72 percent from Q2 2021 to Q3 2025 among women aged 50 to 65, indicating a growing acceptance and utilisation of these treatments.[7] HRT doesn't directly cause weight loss, but on balance, HRT often helps manage weight by improving energy and mood for exercise and diet. [8]

Even if HRT doesn’t cause weight loss directly, many women do lose weight and feel improved wellbeing on HRT, which often means that they have the motivation to make better health choices, longer-term. This, in turn, may make it easier to make healthier food choices. HRT can improve energy levels and, with this, boost motivation to get back into exercise again. [9]

Sleep disturbances often improve with HRT, which is particularly important for maintaining a healthy weight and for optimal fat distribution. A lack of sleep can drive weight gain through the stress hormone, cortisol. So, improved sleep again often means it’s easier to meet your weight loss goals. [10]

If menopausal symptoms are brought under control, it can make it easier to manage your weight and make better choices. HRT is not the answer to weight loss, but it’s a tool that may support you and help you as you go through the menopause.

HRT, GLP-1s, and the scientific intersection

The convergence of research into HRT and GLP-1s like Mounjaro and Wegovy, present new ways to approach weight management during and after menopause.

While HRT has long been recognised for its effectiveness in managing menopausal symptoms like hot flushes, its influence extends to metabolic health and body composition.

Understanding how these two distinct therapeutic approaches interact, and the scientific basis for their combined potential, can help unlock more effective ways for you to reach your weight loss goals.

The broader benefits of HRT

HRT can positively impact bone health, significantly reducing the risk of osteoporosis and fractures. It can also improve mood, cognitive function and sleep quality. [11]

It has been linked to improvements in cardiovascular health when taken early in the menopausal transition. New evidence also suggests HRT plays a role in improving metabolic health markers. [12]

HRT may improve insulin sensitivity, which is crucial for preventing weight gain and reducing the risk of diabetes. It may also enhance the body's response to strength training, potentially helping to preserve or increase muscle mass, a key component for maintaining a healthy metabolism and supporting sustainable weight management. [13] However, the evidence to support this is limited and the guidance is still to prioritise weight-bearing exercise to improve muscle mass and strength.

Combining HRT and GLP-1s

While both HRT and GLP-1 medications, such as Mounjaro and Wegovy, can offer clear benefits for weight management and metabolic health individually, they may work better together when used at the same time.

The rationale behind combining HRT and GLP-1s lies in their complementary mechanisms of action (or ways of working). HRT addresses the hormonal imbalances that contribute to altered fat distribution and potentially slower metabolism during menopause. Simultaneously, GLP-1s directly target appetite regulation and glycemic control, helping with weight loss and improving insulin sensitivity. [14]

Early research suggests that this combined approach can improve weight loss and body composition beyond what either treatment can achieve alone. In one study, women who used Mounjaro alongside HRT lost more weight than those using Mounjaro alone. On average, they lost 17% of their body weight, compared with 14% over 18 months. More research and studies are needed in this area to fully understand the benefits of combining HRT and GLP-1s. [15]

Beyond visible weight loss, the combination of HRT and GLP-1s, when guided by your clinician, could offer a pathway to more holistic metabolic health improvements.

Eligibility for HRT, GLP-1s, or both

Eligibility for HRT depends on your specific menopausal symptoms, personal and family medical history (including risks for cardiovascular disease, certain cancers, and blood clots), and individual preferences. Eligibility for GLP-1 medications is usually determined by body mass index (BMI).

For the combined approach, a healthcare provider will carefully assess the benefits and risks of both therapies used together. The decision to use one, the other, or both will be based on a comprehensive understanding of your individual health and treatment goals for weight management.

Integrating lifestyle changes for sustainable results

Sustainable lifestyle changes are still important, whatever treatment choices you make on your menopause journey. A balanced diet rich in whole foods, lean protein, and fibre, coupled with regular physical activity, including strength training to preserve muscle mass, is essential.

Consulting with a healthcare professional is key to determine your eligibility for treatments and develop an integrated plan that includes sustainable healthy lifestyle strategies. This approach can offer you the support you need to reclaim control over your health and wellbeing during and beyond menopause, paving the way for a healthier, more confident future.

Find out what treatment is suitable for you on MedExpress.

References

1. Santoro N, Roeca C, Peters BA, Neal-Perry G. The Menopause Transition: Signs, Symptoms, and Management Options. J Clin Endocrinol Metab. 2021 Jan 1;106(1):1-15. doi: 10.1210/clinem/dgaa764.
2. Ambikairajah A, Walsh E, Tabatabaei-Jafari H, Cherbuin N. Fat mass changes during menopause: a metaanalysis. Am J Obstet Gynecol. 2019 Nov;221(5):393-409.e50. doi: 10.1016/j.ajog.2019.04.023. Epub 2019 Apr 26. PMID: 31034807
3. Ryan AS, Nicklas BJ, Berman DM. Hormone replacement therapy, insulin sensitivity, and abdominal obesity in postmenopausal women. Diabetes Care. 2002 Jan;25(1):127-33. doi: 10.2337/diacare.25.1.127. PMID: 11772913.
4. Duval K, Prud'homme D, Rabasa-Lhoret R, Strychar I, Brochu M, Lavoie JM, Doucet E. Effects of the menopausal transition on energy expenditure: a MONET Group Study. Eur J Clin Nutr. 2013 Apr;67(4):407-11. doi: 10.1038/ejcn.2013.33. Epub 2013 Feb 20. Erratum in: Eur J Clin Nutr. 2014 Jan;68(1):142.
5. Greendale GA, Sternfeld B, Huang M, Han W, Karvonen-Gutierrez C, Ruppert K, Cauley JA, Finkelstein JS, Jiang SF, Karlamangla AS. Changes in body composition and weight during the menopause transition. JCI Insight. 2019 Mar 7;4(5):e124865. doi: 10.1172/jci.insight.124865.
6. Baker FC, Lampio L, Saaresranta T, Polo-Kantola P. Sleep and Sleep Disorders in the Menopausal Transition. Sleep Med Clin. 2018 Sep;13(3):443-456. doi: 10.1016/j.jsmc.2018.04.011.
7. Kersten Bartelt, RN, Caleb Cox. Hormone Replacement Therapy Prescriptions for Women Up 72% Since 2021 [Internet]. Cosmos Study. 2025. Available from: https://www.epicresearch.org/articles/hormone-replacement-therapy-prescriptions-for-women-up-72-since-2021
8. Kongnyuy EJ, Norman RJ, Flight IHK, Rees MC. Oestrogen and progestogen hormone replacement therapy for peri-menopausal and post-menopausal women: weight and body fat distribution. Cochrane Database of Systematic Reviews 2000, Issue 1. Art. No.: CD001018. DOI: 10.1002/14651858.CD001018.
9. Onalan G, Onalan R, Selam B, Akar M, Gunenc Z, Topcuoglu A. Mood scores in relation to hormone replacement therapies during menopause: a prospective randomized trial. Tohoku J Exp Med. 2005 Nov;207(3):223-31. doi: 10.1620/tjem.207.223.
10. Welton AJ, Vickers MR, Kim J, Ford D, Lawton BA, MacLennan AH, Meredith SK, Martin J, Meade TW; WISDOM team. Health related quality of life after combined hormone replacement therapy: randomised controlled trial. BMJ. 2008 Aug 21;337:a1190. doi: 10.1136/bmj.a1190. PMID: 18719013; PMCID: PMC2518695.
11. Lorentzon M, Johansson H, Harvey NC, Liu E, Vandenput L, Crandall CJ, Cauley JA, LeBoff MS, McCloskey EV, Kanis JA. Menopausal hormone therapy reduces the risk of fracture regardless of falls risk or baseline FRAX probability-results from the Women's Health Initiative hormone therapy trials. Osteoporos Int. 2022 Nov;33(11):2297-2305. doi: 10.1007/s00198-022-06483-y. Epub 2022 Jul 14.
12. Kim, JE., Chang, JH., Jeong, MJ. et al. A systematic review and meta-analysis of effects of menopausal hormone therapy on cardiovascular diseases. Sci Rep 10, 20631 (2020). https://doi.org/10.1038/s41598-020-77534-9
13. Dam TV, Dalgaard LB, Ringgaard S, Johansen FT, Bisgaard Bengtsen M, Mose M, Lauritsen KM, Ørtenblad N, Gravholt CH, Hansen M. Transdermal Estrogen Therapy Improves Gains in Skeletal Muscle Mass After 12 Weeks of Resistance Training in Early Postmenopausal Women. Front Physiol. 2021 Jan 18;11:596130. doi: 10.3389/fphys.2020.596130.
14. Jastreboff AM, Aronne LJ, Ahmad NN, Wharton S, Connery L, Alves B, Kiyosue A, Zhang S, Liu B, Bunck MC, Stefanski A; SURMOUNT-1 Investigators. Tirzepatide Once Weekly for the Treatment of Obesity. N Engl J Med. 2022 Jul 21;387(3):205-216. doi: 10.1056/NEJMoa2206038. Epub 2022 Jun 4. PMID: 35658024.
15. Science Daily. Hormone therapy supercharges tirzepatide, unleashing major weight loss after menopause. The Endocrine Society. [Internet] 2025. Available from: https://www.sciencedaily.com/releases/2025/07/250713031441.htm