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 Clinics Near Me: UK Prescription Options
If you're searching for weight loss clinics near you in the UK, you may be wondering about prescription weight management options available to eligible adults. The good news is that several clinically proven medications are now licensed for weight loss in the UK through both NHS specialist services and private prescribing. Understanding your options, eligibility criteria, and how to access support is the first step toward finding the right approach for your health goals. This guide explains what's available and how to get started.
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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 Management Options
Three prescription medications are currently licensed for weight management in the UK: Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide). All three are GLP-1 or GIP/GLP-1 receptor agonists that may help reduce appetite and support feeling fuller after eating. Clinical trials have shown these medications can help with sustained weight loss alongside a reduced-calorie diet and increased physical activity.
- Mounjaro: A once-weekly injection (dual GIP and GLP-1 agonist). Average weight loss in clinical trials: approximately 15–21% of body weight at maximum dose.
- Wegovy: A once-weekly injection (GLP-1 agonist only). Average weight loss in clinical trials: approximately 14.9% of body weight.
- Saxenda: A daily injection (GLP-1 agonist). Available as an alternative to weekly options.
All three are prescription-only medicines requiring a clinical assessment before being dispensed. Eligibility is based on BMI, weight-related health conditions, and individual health factors. Try our free GLP-1 weight loss calculator above to explore potential outcomes at different doses.
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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 Route
In the UK, you can access prescription weight management through two routes. NHS access is through specialist tier 3 or tier 4 weight management services, typically requiring a referral from your GP. Availability varies significantly by region and ICB (Integrated Care Board), with waiting lists sometimes running months or even years. Private access is available through GPhC-registered online prescribing services, where you complete a clinical consultation with a UK-licensed prescriber and receive a prescription if deemed appropriate—no NHS referral required.
To check eligibility, start a conversation with your GP about weight management support. They can assess whether you meet the criteria (BMI of 30 or above, or BMI of 27–29.9 with weight-related health conditions), discuss your options, and refer you to specialist services if appropriate. Use our free BMI calculator above to check your current BMI as a starting point for that conversation.
- 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.
What BMI do I need to be eligible for prescription weight loss medication in the UK?
Adults with a BMI of 30 or above, or a BMI of 27–29.9 with at least one weight-related health condition (such as type 2 diabetes, high blood pressure, or sleep apnoea), may be eligible. For people of South Asian, Chinese, Black African, or Black Caribbean heritage, lower BMI thresholds may apply. Your GP or prescriber will assess your individual eligibility.
How long does it take to access weight loss medication through the NHS?
Waiting times vary significantly depending on your region and local ICB. Some areas have relatively short waits of a few weeks, whilst others may have waits of several months or longer. Private access through online prescribing services is typically faster, often within days or weeks of completing a clinical consultation.
Are prescription weight loss medications like Mounjaro assured to work?
No. Whilst clinical trials show these medications help many people lose weight, individual results vary significantly. They work best alongside a reduced-calorie diet and increased physical activity. Some people may experience greater weight loss than others, and results are not assured. Your prescriber will monitor your progress and adjust treatment accordingly.
Can I switch between Mounjaro and Wegovy?
Switching between medications is possible but must be managed by your prescriber. There is no official conversion chart—your prescriber will assess the most appropriate dose based on your health, tolerance, and previous response. Never switch medications without clinical guidance.
What should I do if I can't get weight loss medication on the NHS in my area?
If NHS access in your area is limited or has long waiting lists, you can explore private prescribing through GPhC-registered online services. A UK-licensed prescriber will conduct a clinical assessment and issue a prescription if appropriate. Costs vary but typically range from £129–£320 per month depending on medication and dose.
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.