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
Free tracker included with every download this week
Rebounding and Weight Loss — What Works in the UK
Rebounding — jumping on a mini trampoline — is often promoted for fitness and weight management. While it can be part of a healthy exercise routine, sustainable weight loss requires a combination of physical activity, dietary changes, and sometimes medical support. If you're looking for comprehensive weight management in the UK, prescription options are available for eligible adults alongside lifestyle changes. Our free BMI calculator can help you understand your current health status and whether you might qualify for additional support.
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Calculate Your BMI Instantly
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.
UK Prescription Weight Management Options
For adults meeting NHS eligibility criteria, several prescription weight loss medications are available in the UK. These are most effective when combined with exercise like rebounding and reduced-calorie eating.
- Mounjaro (tirzepatide) — A once-weekly injection that activates dual GIP and GLP-1 pathways. Clinical trials showed an average weight loss of 15–21% body weight over 72 weeks, though individual results vary significantly.
- Wegovy (semaglutide) — A once-weekly GLP-1 injection. STEP trials demonstrated average weight loss of approximately 15% body weight at the maximum dose.
- Saxenda (liraglutide) — A once-daily GLP-1 injection, an alternative option for eligible adults.
Eligibility requires a BMI of 30 or above, or 27–29.9 with weight-related health conditions like type 2 diabetes, high blood pressure, or cardiovascular disease. Try our GLP-1 weight loss calculator to explore potential outcomes at different doses if you think you may be eligible.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
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.
Free Weight Loss Tools & Guides
Everything you need to understand your weight, explore medication options, and track your progress — completely free.
NHS vs Private Access — Finding Support
NHS route: Referral through your GP to a specialist tier 3 weight management service. Availability and waiting times vary significantly by region (ICB), with some areas experiencing lengthy delays.
Private route: Online consultations with UK-licensed prescribers, with prescriptions dispensed by GPhC-registered pharmacies. Available without NHS referral, typically costing £129–£320 monthly depending on dose.
Start by calculating your BMI using our free tool above, then speak with your GP about whether prescription weight loss treatment combined with regular exercise — including activities like rebounding — might support your health goals. Your GP can assess eligibility and discuss the best route for your circumstances.
- 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.
Does rebounding alone cause weight loss?
Rebounding is a low-impact cardiovascular activity that can support fitness and calorie burn, but weight loss fundamentally requires a calorie deficit. Rebounding works best combined with dietary changes and, for eligible adults, prescription weight management support. The NHS recommends losing no more than 0.5–1 kg per week for sustainable results.
Can I use rebounding alongside weight loss medication?
Yes. In fact, prescription weight loss medications like Mounjaro and Wegovy are designed to work alongside lifestyle changes including regular exercise and reduced-calorie eating. Rebounding is a low-impact option that many people find enjoyable. Always discuss your exercise plan with your prescriber.
How do I know if I'm eligible for prescription weight loss treatment in the UK?
You may be eligible if you have a BMI of 30 or above, or 27–29.9 with weight-related health conditions. Use our free BMI calculator to check your current BMI, then speak with your GP. They can assess your individual circumstances and discuss available options through NHS or private services.
What's the difference between Mounjaro and Wegovy for weight loss?
Mounjaro (tirzepatide) is a dual GIP and GLP-1 agonist; Wegovy (semaglutide) is a GLP-1 agonist only. Clinical trials showed Mounjaro achieved slightly higher average weight loss (up to 21% vs 15%), but individual results vary. Both are once-weekly injections. Your prescriber will recommend the most suitable option for you.
How quickly can I expect weight loss results with prescription medication?
Most people notice initial effects within weeks, though significant weight loss typically develops over months. Clinical trials measure results over 68–72 weeks. The NHS recommends losing 0.5–1 kg weekly for sustainable results. Use our progress tracker to log your journey and celebrate milestones alongside regular rebounding and dietary changes.
Ready to take control of your weight loss journey?
Start with a free BMI check, explore your GLP-1 options, or begin tracking your progress today. No sign-up. No cost. Just results.