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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Manjouro — UK Health Information
Manjouro is not an approved weight management medication in the UK. If you've encountered this name while researching weight loss options, you may be thinking of Mounjaro (tirzepatide) or Wegovy (semaglutide) — both prescription-only weight management injections licensed in the UK. This guide explains what's actually available for weight management under NHS guidance and through private prescribing in the UK, and how to access proper clinical support for your health goals.
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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.
Approved Weight Management Options in the UK
The UK has three licensed prescription weight management medications available to eligible adults:
- Mounjaro (tirzepatide) — a once-weekly injection that activates GIP and GLP-1 pathways, helping regulate appetite and support feeling fuller. Clinical trials showed an average weight loss of 15–21% of body weight when combined with dietary changes and physical activity.
- Wegovy (semaglutide) — a once-weekly GLP-1 injection licensed for weight management, with average trial results of approximately clinically studied weight loss over 68 weeks.
- Saxenda (liraglutide) — a daily GLP-1 injection, less commonly prescribed than the weekly options but available through NHS specialist services.
All three are prescription-only medicines requiring clinical assessment. Access through the NHS involves referral to specialist tier 3 weight management services. Private access is available through GPhC-registered online pharmacies following an online consultation with a UK-licensed prescriber.
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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.
Getting Support for Weight Management in the UK
If you're seeking weight management support in the UK, your first step is a conversation with your GP. They can assess your individual health, discuss your weight goals, and refer you to appropriate services if medication may help. The NHS provides free tools and guidance: use our free BMI calculator above to understand your current weight category, and our weight converter to track measurements in stone, pounds, and kilograms — the units most familiar to UK adults.
Weight management is most effective when combining medication (if prescribed), dietary changes, increased physical activity, and behaviour support. Your GP or specialist can signpost you to community weight management programmes, digital apps, and evidence-based resources tailored to your needs.
- 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 is Manjouro?
Manjouro is not a recognised weight management medication in the UK. You may be thinking of Mounjaro (tirzepatide), which is a prescription-only weight management injection approved in the UK. If you've seen "Manjouro" online, it may be a misspelling, a brand name used outside the UK, or unverified information. Always check medication names with your GP or a GPhC-registered pharmacy.
Can I get weight management medication on the NHS in the UK?
Yes. If you have a BMI of 30 or above (or 27 with weight-related health conditions), you may be eligible for prescription weight management through NHS specialist tier 3 services. Your GP can assess you and refer you if appropriate. Availability and waiting times vary significantly by region. Private prescribing is also available through online consultations with UK-licensed prescribers.
What's the difference between Mounjaro and Wegovy in the UK?
Both are once-weekly injections licensed in the UK for weight management. Mounjaro (tirzepatide) activates two pathways (GIP and GLP-1) and showed average weight loss of 15–21% in trials. Wegovy (semaglutide) activates GLP-1 only and showed average weight loss of approximately 15%. Both require a prescription and clinical assessment. Your prescriber will advise which suits you best.
How do I know if I'm eligible for weight management medication?
You may be eligible if you're an adult 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). Use our free BMI calculator above to check your BMI, then discuss with your GP. Eligibility is assessed individually based on your health and circumstances.
How do I start the process of getting weight management support?
Book an appointment with your GP to discuss your weight management goals. Your GP will assess your health, calculate your BMI, and discuss whether prescription medication might help. They can refer you to NHS specialist services if eligible, or signpost you to community programmes and digital resources. If you prefer private prescribing, you can access online consultations with UK-licensed prescribers through GPhC-registered pharmacies.
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.