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
What Is the Cost of Zepbound in the UK?
Zepbound is the US brand name for semaglutide, a prescription-only weight management injection. However, Zepbound is not currently available or licensed in the UK — the UK-licensed version is called Wegovy, manufactured by Novo Nordisk. If you're searching for semaglutide cost in the UK, you'll be looking at Wegovy pricing, which ranges from approximately £129 to £320 per month depending on the dose and provider. Understanding your options — whether through NHS guidance or private prescribing — can help you make an informed decision about weight management that fits your health needs and budget.
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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.
Understanding Zepbound vs Wegovy in the UK
Zepbound is the American brand name for semaglutide 2.4 mg, approved by the US MHRA. In the UK, the same medication is branded as Wegovy and is licensed by the MHRA for weight management in adults. There is no product called "Zepbound" available in UK pharmacies — if you're looking for semaglutide for weight management in the UK, you need to search for Wegovy instead.
Semaglutide is a GLP-1 receptor agonist that works by reducing appetite, helping you feel fuller after smaller meals, and supporting blood sugar control. In clinical trials (the STEP studies), participants lost an average of around 15% of their body weight when using semaglutide 2.4 mg alongside a reduced-calorie diet and increased physical activity — though individual results vary significantly.
Wegovy is prescription-only and requires a clinical assessment before dispensing. It's not available over-the-counter and must be prescribed by a UK-licensed healthcare professional.
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.
Wegovy Cost and Access Options in the UK
NHS access: Wegovy may be available through NHS specialist weight management services (tier 3), but availability varies by region and waiting lists can be lengthy. Your GP can refer you to a specialist service if you meet eligibility criteria.
Private access: Semaglutide is available through GPhC-registered online prescribing services at costs ranging from approximately £129–£320 per month depending on the dose (0.25 mg to 2.4 mg). Private prescribers typically charge a consultation fee (£10–£50) plus medication costs. Eligibility is assessed on an individual basis following an online clinical consultation. Payment is usually required upfront, and prescriptions are dispensed by registered pharmacies.
Check our free GLP-1 weight loss calculator to explore potential outcomes, and use our BMI calculator to assess whether you meet typical eligibility criteria (BMI 30 or above, or 27+ with weight-related health conditions).
- 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.
Is Zepbound available in the UK?
No. Zepbound is the US brand name for semaglutide and is not licensed in the UK. The UK-licensed version is Wegovy, manufactured by Novo Nordisk. Both contain the same active ingredient (semaglutide) but Zepbound is not available through UK pharmacies or NHS services.
How much does Wegovy cost in the UK?
Wegovy costs approximately £129–£320 per month through private prescribing services, depending on the dose. Prices vary between providers. NHS access is available in some regions through specialist weight management services, but availability and waiting times vary significantly across the UK.
Is Wegovy the same as Ozempic?
Both contain semaglutide, but they are different products. Ozempic is approved for type 2 diabetes management (doses up to 2 mg). Wegovy is licensed for weight management (doses up to 2.4 mg). In the UK, Ozempic is not licensed for weight loss — Wegovy is the correct licensed product for weight management.
How do I get Wegovy on the NHS?
You need to be referred to a NHS tier 3 specialist weight management service by your GP. You'll be assessed for eligibility (typically BMI 30 or above, or 27+ with weight-related health conditions). NHS provision varies significantly by region — some areas have shorter waiting times than others.
Can I buy Zepbound online in the UK?
Zepbound is not available in the UK. However, Wegovy can be prescribed through licensed UK online prescribing services following a clinical consultation. Any service offering "Zepbound" to UK customers would be non-compliant — always use GPhC-registered pharmacies and UK-licensed prescribers for safety.
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.