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
Weight Loss Clinics in the UK: What You Need to Know
Weight loss clinics in the UK offer structured support for sustainable weight management. These range from NHS specialist weight management services to private clinics offering prescription weight loss medication, behavioural support, and nutritional guidance. Whether you're looking for NHS weight loss services or considering private options like GLP-1 injections, understanding the different types of clinics available can help you choose the right support for your goals. Most clinics work alongside lifestyle changes, diet, and exercise for best results.
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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.
Types of Weight Loss Clinics Available in the UK
The UK has several tiers of weight management support. NHS specialist services (Tier 3 and Tier 4) are free but typically require GP referral and assessment. These multidisciplinary teams include dietitians, psychologists, and weight management specialists. Private weight loss clinics offer faster access and include aesthetic clinics, nutritional coaching services, and prescribing clinics that specialise in GLP-1 weight loss medication. Online weight management programmes provide digital support, tracking, and remote consultations. Some clinics focus purely on behaviour change and diet; others combine lifestyle intervention with prescription medication for weight management UK. Most reputable clinics are GPhC-registered if offering prescription medications, and staff are qualified healthcare professionals. Ask about qualifications, accreditation, and whether they offer bmi weight loss assessments before committing.
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 Weight Loss Services vs Private Clinics
NHS weight loss services are free at point of use and follow NICE guidelines, but waiting times can be months or years depending on your region. Private clinics offer quicker access and more flexibility but require payment. Some private clinics offer prescription weight loss medication like GLP-1 injections following an online consultation and clinical assessment. When comparing options, consider: waiting time, cost, type of support (medication, behavioural, nutritional), professional qualifications, and aftercare support. Your GP can discuss NHS referral options, or you can self-refer to private services. Many people combine private initial assessment with NHS follow-up care for ongoing support.
- 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 does a weight loss clinic actually do?
A weight loss clinic provides personalised assessment, weight management planning, and ongoing support. Services typically include health checks, BMI and body composition assessments, nutrition counselling, behaviour change support, and sometimes prescription medications. Some offer fitness guidance and mental health support. The goal is sustainable weight loss alongside improved overall health, not quick fixes.
Do I need a GP referral to access weight loss clinics?
NHS specialist weight loss clinics require a GP referral. Private clinics do not — you can self-refer directly. Your GP can discuss whether referral is appropriate for your circumstances and may recommend specific services in your area. Even when using private services, keeping your GP informed is advisable.
How much do private weight loss clinics cost?
Costs vary widely. Consultation fees range from £50 to £200+. If prescription weight loss medication is involved, monthly costs typically range from £100 to £300+ depending on the dose and medication type. Some clinics offer package deals or payment plans. Ask about all costs upfront before starting treatment.
Can I get prescription weight loss injections through a weight loss clinic?
Yes, many private clinics offer prescription weight loss medications like GLP-1 injections following an online or in-person clinical assessment. These are prescription-only medicines available only through appropriately licensed prescribers. NHS access is more limited and typically through specialist tier 3 services, often with longer waiting times.
What qualifications should weight loss clinic staff have?
Look for clinics staffed by registered healthcare professionals: doctors (GMC-registered), nurses (NMC-registered), dietitians (RCRD-registered), and psychologists (HCPC-registered). If the clinic prescribes medication, staff must be GPhC-registered prescribers. Check credentials before booking — reputable clinics display staff qualifications clearly.
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.