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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Wegovy Weight Loss Results: UK Cost and Access
Wegovy (semaglutide) is a prescription-only weekly weight loss injection licensed in the UK. Clinical trials showed an average weight loss of around 15% body weight, though individual results vary significantly. Access in the UK is available through two main routes: NHS specialist services or private online prescriptions. Understanding the cost and eligibility criteria can help you decide which option suits your situation best.
10,000+ calculations today ยท NHS-aligned thresholds ยท 100% free
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/mยฒ).
While BMI isn't a perfect measure โ it doesn't account for muscle mass, bone density, or fat distribution โ 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 โ 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.
Wegovy Cost in the UK: Private and NHS Routes
Private online prescription costs: Wegovy through UK private prescribers typically ranges from ยฃ130โยฃ320 per month, depending on the dose. A full treatment course from starting dose (0.25 mg) to maintenance (2.4 mg) usually takes 16โ20 weeks. The weekly weight loss injection format means you'll need ongoing prescriptions as you progress through dose escalations.
NHS access: If eligible through NICE guidelines, Wegovy is available on the NHS through specialist tier 3 weight management services. There is no prescription charge beyond the standard NHS prescription fee (ยฃ9.90 in England), but regional variation and waiting lists can be significant โ some areas have waiting times exceeding 12โ18 months.
- Starting dose (0.25โ1 mg): ยฃ130โยฃ180/month private
- Maintenance dose (2.4 mg): ยฃ250โยฃ320/month private
- NHS: Standard prescription fee only (if eligible and available)
Semaglutide weight loss through private routes offers faster access without NHS referral delays.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care โ 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 โ 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 โ completely free.
How to Access Wegovy: NHS vs Private Online
NHS route: Speak to your GP about tier 3 weight management services in your area. Eligibility requires BMI โฅ30 or BMI 27โ29.9 with weight-related health conditions. Your GP must refer you; you cannot self-refer. Waiting lists vary dramatically by region and ICB commissioning.
Private route: Complete an online consultation with a UK-licensed prescriber through a GPhC-registered pharmacy. The process typically takes 24โ48 hours. You'll answer health questions, declare medications, and a clinician assesses suitability. If approved, your prescription is sent to the pharmacy. This route allows you to start without NHS referral.
Our GLP-1 weight loss calculator can help you estimate potential results at different doses, giving you context before consulting a prescriber.
- 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 โ 5mg โ 7.5mg โ 10mg โ 12.5mg โ 15mg
- GLP-1 receptor agonist
- Up to 15โ17% body weight loss (STEP trials)
- Weekly injection, 5-step dose escalation
- NHS & private prescription available
- Doses: 0.25mg โ 0.5mg โ 1mg โ 1.7mg โ 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 | 15โ22.5% | 12โ17% |
| Key trial | SURMOUNT-1 (2022) | STEP 1 (2021) |
| Max dose | 15 mg weekly | 2.4 mg weekly |
| Escalation period | 20โ32 weeks | 16โ20 weeks |
| Administration | Weekly injection (pen) | Weekly injection (pen) |
| NHS availability | Private prescription only | NHS & private |
| Approx. private cost | ยฃ150โยฃ250/month | ยฃ150โยฃ300/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 โ 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.
How much weight can I expect to lose with Wegovy in the UK?
Clinical trial data shows an average weight loss of around 15% body weight over 68 weeks at the maximum 2.4 mg dose, alongside diet and exercise. Individual results vary considerably โ some lose more, some less. Your progress tracker can help you monitor your actual results over time.
Is Wegovy available on the NHS in the UK?
Yes, but only through specialist tier 3 weight management services following a GP referral. Eligibility requires BMI โฅ30 or BMI 27โ29.9 with weight-related health conditions. NHS availability and waiting times vary significantly by region โ some areas have long delays of 12โ18 months.
What's the difference between Wegovy and Mounjaro for cost?
Wegovy (semaglutide) and Mounjaro (tirzepatide) have similar private costs (ยฃ130โยฃ320/month). Mounjaro may require slightly higher doses. Wegovy vs Mounjaro differences centre on mechanism and trial results โ your prescriber can advise which suits you better based on your health profile.
Do I need a GP referral to get Wegovy privately?
No. Private online prescribers can assess you directly without GP involvement. You complete an online consultation, declare your health conditions and medications, and a UK-licensed clinician decides suitability. This process bypasses NHS waiting lists entirely.
What happens after I reach the maximum Wegovy dose?
Once you stabilise at 2.4 mg (typically after 16โ20 weeks), you continue the same dose weekly. Private prescriptions are issued monthly. If you stop Wegovy, weight regain can occur โ weight management is typically long-term. Your GP can discuss ongoing management and whether continuation suits your health goals.
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.