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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Reformer Pilates Weight Loss — UK Medication Options
Reformer pilates is an effective exercise for building strength, flexibility, and core stability, but weight loss ultimately depends on creating a calorie deficit through diet and activity combined. If you're exploring weight management in the UK, prescription medication is available for eligible adults alongside lifestyle changes. This guide explains your options for nhs weight loss support and prescription weight loss uk medication that can complement your fitness routine.
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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-Licensed Prescription Weight Loss Options
Three glp-1 weight loss medications are currently licensed in the UK for weight management in eligible adults:
- Mounjaro (tirzepatide) — a dual GIP and GLP-1 receptor agonist, given as a once-weekly injection. Clinical trials showed an average weight loss of 15–21% body weight at maximum dose, though individual results vary.
- Wegovy (semaglutide) — a GLP-1 receptor agonist, given as a once-weekly injection. Average weight loss was approximately 15% body weight in clinical trials, alongside diet and exercise.
- Saxenda (liraglutide) — a GLP-1 receptor agonist, given as a once-daily injection. This is an older option but still available.
These weight loss injections uk work by helping reduce appetite, increase feelings of fullness, and support better blood sugar control. They are prescription-only and require a clinical assessment to determine eligibility. Use our free GLP-1 weight loss calculator to see projected results at different doses.
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 Your Right Option
In the UK, weight loss medication nhs is available through specialist tier 3 weight management services — your GP can refer you. However, NHS access varies significantly by region and waiting lists can be lengthy. Private access is available through GPhC-registered online pharmacies following a consultation with a UK-licensed prescriber, with no NHS referral required.
Eligibility requires a BMI of 30 or above, or 27–29.9 with weight-related health conditions such as type 2 diabetes, high blood pressure, or sleep apnoea. Use our free BMI calculator to check your personal BMI, then speak with your GP about whether prescription weight management is appropriate for you alongside reformer pilates and other lifestyle changes.
- 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.
Can reformer pilates alone help me lose weight?
Reformer pilates builds strength and improves fitness, but weight loss requires a calorie deficit. Combining regular exercise with dietary changes is more effective than either approach alone. For significant weight loss, your GP can discuss whether prescription medication might support your efforts.
Am I eligible for prescription weight loss medication in the UK?
You may be eligible if your BMI is 30 or above, or 27–29.9 with weight-related health conditions like diabetes or high blood pressure. Your GP or a licensed prescriber can assess your individual circumstances after a consultation.
How does GLP-1 medication work alongside exercise?
GLP-1 medications help reduce appetite and support feeling fuller, making it easier to maintain a calorie deficit. They work best combined with exercise like reformer pilates and healthy eating. They are not a replacement for lifestyle changes.
What is the average weight loss with prescription medication?
Clinical trials showed average weight loss of 15–21% body weight depending on the medication and dose, over several months. However, individual results vary significantly. Our weight loss calculator can help estimate potential outcomes based on different doses.
How do I access weight loss medication on the NHS?
Ask your GP for a referral to your local specialist weight management service (tier 3). Alternatively, private online prescribing is available without NHS referral through GPhC-registered pharmacies — eligibility is assessed following an online consultation.
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.