The UK's most complete GLP-1 guide
Every Question Answered. Every Side Effect Explained.
- How GLP-1 medications work
- Mounjaro vs Wegovy compared
- Injection instructions
- Side effects & solutions
- What to eat on treatment
- FAQs answered
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Weight Loss After Menopause — UK Guide
Weight loss becomes more challenging after menopause due to declining oestrogen levels, which affects metabolism, fat distribution, and appetite regulation. Many UK women find they gain weight more easily and lose it more slowly postmenopausally, even without changing diet or exercise. Understanding the hormonal factors at play and knowing what weight management options are available—including lifestyle changes, prescription medication, and NHS support—can help you manage your weight effectively. This guide explains why postmenopausal weight loss is different and what strategies work best for UK women.
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Enter your height and weight below. Supports both imperial (stone & lbs) and metric (kg). Results include NHS category, healthy weight range, and ethnicity adjustments.
What Is BMI and Why Does It Matter?
Body Mass Index (BMI) is the most widely used screening tool for assessing whether your weight falls within a healthy range. Used by the NHS, GPs, and weight management services across the UK, BMI provides a quick snapshot of your weight relative to your height. The formula is simple: your weight in kilograms divided by your height in metres squared (kg/m²).
While BMI isn't a perfect measure — it doesn't account for muscle mass, bone density, or fat distribution — it remains the standard first step in identifying potential weight-related health risks including type 2 diabetes, cardiovascular disease, high blood pressure, and certain cancers.
The NHS also recommends adjusted thresholds for people of South Asian, Chinese, or Black African heritage — a BMI of 23 or above is classified as overweight, and 27.5 as obese. Our calculator includes this adjustment as a one-click toggle.
Why Weight Loss Is Harder After Menopause
During menopause, oestrogen levels drop dramatically, triggering several changes that affect body weight. Oestrogen plays a key role in regulating metabolism, appetite, and where your body stores fat. After menopause, your metabolic rate decreases by approximately 2–8%, meaning you burn fewer calories at rest. Simultaneously, your body shifts to storing more fat around the abdomen rather than the hips and thighs, increasing health risks.
Declining oestrogen also affects hunger hormones like leptin and ghrelin, making it easier to overeat and harder to feel full. Muscle loss accelerates after menopause due to reduced oestrogen and growth hormone, and muscle burns more calories than fat. Combined with reduced physical activity levels (common as women age), these changes create a perfect storm for weight gain.
The good news: weight loss is still achievable postmenopausally. It may require adjusting your calorie intake, increasing physical activity, and sometimes considering prescription weight management options. Check your BMI using our free BMI calculator to understand your current health position.
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How It Works
Three simple steps to understand your weight and take action.
Enter your height and weight in our free calculator. Get your BMI, NHS category, healthy weight range, and ethnicity-adjusted thresholds instantly.
If your BMI suggests you're overweight or obese, explore our GLP-1 calculators to project potential weight loss on Mounjaro or Wegovy.
Use our progress tracker to log your weight weekly, visualise your journey with charts, and stay motivated — all stored privately in your browser.
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Weight Management Strategies for Postmenopausal Women
Lifestyle changes remain the foundation: A modest calorie deficit of 500 kcal per day supports approximately 0.5 kg weight loss per week. Prioritise protein intake (helps preserve muscle), regular resistance training (counters muscle loss), and strength work two to three times weekly. Walking, swimming, and cycling are sustainable options.
Prescription weight loss options may help if lifestyle changes alone aren't sufficient. GLP-1 weight loss medication like Wegovy (semaglutide) is available in the UK through NHS specialist services or private prescribing for eligible adults. Evidence suggests GLP-1 medications may help regulate appetite and support weight loss alongside diet and exercise—though individual results vary. Your GP can discuss eligibility and referral to specialist weight management services. Use our GLP-1 weight loss calculator to explore potential outcomes if considering medication.
- Dual GIP/GLP-1 receptor agonist
- Up to 22.5% body weight loss (SURMOUNT-1)
- Weekly injection, dose escalation over 20+ weeks
- Available via private prescription in the UK
- Doses: 2.5mg → 5mg → 7.5mg → 10mg → 12.5mg → 15mg
- GLP-1 receptor agonist
- Up to 15–17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg → 0.5mg → 1mg → 1.7mg → 2.4mg
Mounjaro vs Wegovy: Head-to-Head
A side-by-side comparison of the two most popular GLP-1 weight loss medications available in the UK.
| Feature | Mounjaro | Wegovy |
|---|---|---|
| Drug class | Dual GIP/GLP-1 agonist | GLP-1 agonist |
| Active ingredient | Tirzepatide | Semaglutide |
| Avg. weight loss | 15–22.5% | 12–17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20–32 weeks | 16–20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | £150–£250/month | £150–£300/month |
| Common side effects | Nausea, diarrhoea, constipation | Nausea, vomiting, diarrhoea |
Data sourced from SURMOUNT-1 and STEP 1 clinical trials. Costs are approximate and vary by provider. Always consult a prescriber.
Am I Eligible for Weight Loss Medication?
In the UK, eligibility for GLP-1 weight loss medications like Mounjaro and Wegovy is based on your BMI and overall health profile.
- BMI of 30 or above (obese)
- Age 18 or over
- No contraindicated conditions
- Committed to lifestyle changes
- BMI of 27 or above
- Plus type 2 diabetes
- Or high blood pressure
- Or obstructive sleep apnoea
Use our BMI calculator to check whether your BMI falls within the eligible range.
How We Built These Tools
Every calculator and guide on myweightcheck is built with accuracy and transparency in mind. Our BMI calculator uses the standard WHO formula with NHS-aligned category thresholds. Our GLP-1 projections are modelled on published clinical trial data from SURMOUNT and STEP studies.
All data stays on your device. We don't require sign-ups, and we don't store your health information on any server. Your progress tracker saves data locally in your browser using localStorage, so only you can see it.
We're based in the UK and our tools are designed specifically for UK users — supporting stone & lbs by default, referencing NHS guidelines, using NICE-approved medication data, and linking to GPhC-registered pharmacies.
Frequently Asked Questions
Common questions about BMI, weight loss medications, and our free UK tools.
Why do we gain weight more easily after menopause?
Oestrogen regulates metabolism, appetite, and fat distribution. When oestrogen drops during menopause, your metabolic rate decreases by 2–8%, hunger hormones become less effective at signalling fullness, and your body preferentially stores fat around the abdomen. Muscle loss accelerates simultaneously, reducing overall calorie burn.
Can weight loss medication help postmenopausal women?
Yes, prescription weight loss medications like Wegovy (semaglutide) are licensed in the UK for adults meeting eligibility criteria. Clinical trials showed Wegovy may help achieve average weight loss of around 15% alongside diet and exercise—though individual results vary. Eligibility requires a clinical assessment. Your GP can refer you to NHS specialist services.
What's the healthiest rate of postmenopausal weight loss?
The NHS recommends losing 0.5–1 kg (1–2 lbs) per week for sustainable results. gradual weight management often leads to muscle loss, which is already a concern postmenopausally. A moderate calorie deficit, strength training to preserve muscle, and adequate protein intake support healthier postmenopausal weight loss.
Should postmenopausal women exercise differently?
Yes. Resistance training and strength work two to three times weekly help preserve muscle mass and bone density—both critical postmenopausally. Combine this with cardiovascular activity like walking or swimming. Regular physical activity also helps regulate appetite hormones and supports metabolic health independent of weight loss.
What's a healthy BMI for postmenopausal women?
The NHS recommends a healthy BMI of 18.5–24.9 for all adults, including postmenopausal women. However, BMI doesn't account for muscle mass or fat distribution—both important postmenopausally. Use our free BMI calculator to check your BMI, then discuss context with your GP, especially regarding central fat storage (waist circumference).
Ready to take control of your weight loss journey?
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