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
Is Mouranjo a Real Weight Loss Medication?
Mouranjo is not an actual medication available in the UK or anywhere else. If you've heard this term and are searching for weight loss options, you may be looking for Mounjaro (tirzepatide) or Wegovy (semaglutide) — both are prescription-only weight management injections licensed in the UK. This guide clarifies the difference and explains your real options for evidence-based weight loss support through NHS guidance and licensed prescription treatments.
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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.
Real Weight Loss Medications Licensed in the UK
The UK has three prescription-only medications licensed specifically for weight management in adults:
- Mounjaro (tirzepatide) — a once-weekly injection that works as a dual GIP and GLP-1 receptor agonist. Clinical trials showed average weight loss of 15–21% of body weight alongside a reduced-calorie diet and increased physical activity.
- Wegovy (semaglutide) — a once-weekly GLP-1 receptor agonist injection. STEP trial data showed average weight loss of approximately 15% of body weight.
- Saxenda (liraglutide) — a daily GLP-1 injection, less commonly prescribed but available.
All three require a prescription following a clinical assessment from a licensed prescriber. They are not available over-the-counter and are not cosmetic treatments. Use our free GLP-1 weight loss calculator to explore potential outcomes with these medications, and check your BMI using our BMI calculator for personalised context.
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.
How to Access Weight Loss Treatment in the UK
There are two main routes to prescription weight loss medication in the UK. Through the NHS, you can be referred by your GP to a specialist tier 3 weight management service — though waiting times vary significantly by region and availability. Alternatively, private online prescribing offers faster access: a licensed UK prescriber conducts a clinical assessment via secure consultation, and if you're eligible, your prescription is sent to a GPhC-registered pharmacy.
Eligibility typically includes adults with a BMI of 30 or above, or 27–29.9 with weight-related health conditions like type 2 diabetes, high blood pressure, or sleep apnoea. Track your progress with our free progress tracker once treatment starts, and use our weight converter to monitor your weight in stone and kg.
- 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 should I do if I've been offered "mouranjo" by a clinic?
If a clinic is advertising a medication called "mouranjo", this is not a legitimate licensed medication. Speak to your GP or verify any weight loss treatment with the MHRA (Medicines and Healthcare products Regulatory Agency). Real licensed options are Mounjaro, Wegovy, and Saxenda — always check the exact spelling and ask for the patient information leaflet.
Is Mouranjo the same as Mounjaro?
No. Mouranjo does not exist. You may be thinking of Mounjaro (tirzepatide), which is a real, licensed weight management injection. The spelling is important — always verify medication names with your prescriber or pharmacist.
Can I get Mounjaro or Wegovy on the NHS?
Yes, both are available through NHS specialist weight management services (tier 3). However, NHS availability and waiting times vary significantly by region. Your GP can refer you, but access depends on your local Integrated Care Board's commissioning. Private online prescribing offers faster access for those who meet eligibility criteria.
What's the difference between Wegovy and Ozempic?
Both contain semaglutide, but Ozempic is licensed for type 2 diabetes (doses up to 2mg) and is not authorised for weight loss in the UK. Wegovy is the licensed weight management version with a higher maximum dose of 2.4mg. Using Ozempic for weight loss would be off-label prescribing.
How do I know if I'm eligible for weight loss medication?
Eligibility typically requires a BMI of 30 or above, or 25–29.9 with weight-related health conditions. Use our free BMI calculator to check your BMI, then speak to your GP or a licensed prescriber about whether medication is appropriate for you. A clinical assessment is always required before prescription.
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.