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 Majourno?
Majourno is not a currently recognised weight management medication in the UK health system. You may have encountered this term when researching weight loss injections, but it's important to clarify: the prescription-only medicines licensed for weight management in the UK are Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide). If you're exploring weight management options or trying to understand different GLP-1 medications, this guide explains what's actually available and how to access legitimate treatment through NHS guidance or a clinical assessment with a licensed prescriber.
10,000+ calculations today · NHS-aligned thresholds · 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/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.
Licensed Weight Management Injections in the UK
The UK has three prescription-only injectable medicines licensed for weight management in adults. Mounjaro (tirzepatide) is a dual GIP and GLP-1 receptor agonist that works by activating two natural hormone pathways to help regulate appetite and support feeling fuller after meals. Wegovy (semaglutide) is a GLP-1 receptor agonist approved for weight management, distinct from Ozempic (also semaglutide) which is licensed only for type 2 diabetes — Wegovy is the licensed weight loss version. Saxenda (liraglutide) is a daily GLP-1 injection. All three are prescription-only and require a clinical assessment before being prescribed. Access in the UK is through NHS specialist weight management services or private online prescribing following a consultation with a licensed prescriber. Use our free BMI calculator to check your personal BMI and understand where you sit on the NHS healthy weight scale — this information is important when discussing weight management options with your GP or 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.
How to Access Weight Management Treatment in the UK
If you're interested in prescription weight loss treatment, your first step is to speak with your GP, who can assess your eligibility based on BMI and any weight-related health conditions. NHS access is through tier 3 specialist weight management services, though waiting lists vary significantly by region. Alternatively, private online prescribing services offer consultation with a UK-licensed prescriber without an NHS referral — these services are regulated by the GPhC and require a full health assessment. Whatever route you choose, weight loss medications work best alongside lifestyle changes including a reduced-calorie diet and increased physical activity. Our GLP-1 weight loss calculator can help you understand potential outcomes at different doses, and our progress tracker allows you to log your weight loss journey if you begin treatment.
- 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 majourno a real weight loss medicine?
Majourno is not a currently licensed weight management medication in the UK. If you've seen this term, you may be looking for information about Mounjaro, Wegovy, or Saxenda — the three prescription-only weight loss injections licensed in the UK. Always check the exact spelling and consult your GP or a licensed prescriber for accurate information.
What's the difference between Wegovy and Ozempic?
Both contain semaglutide, but Wegovy is licensed specifically for weight management (doses up to 2.4 mg), while Ozempic is licensed for type 2 diabetes (doses up to 2 mg). Using Ozempic for weight loss is off-label in the UK. Wegovy is the approved weight management version.
Can I get prescription weight loss injections on the NHS?
Yes, through NHS tier 3 specialist weight management services. Your GP can refer you if you meet eligibility criteria (BMI ≥30, or BMI 27–29.9 with weight-related health conditions). Availability and waiting times vary by region. Private access is also available through GPhC-registered online prescribing services.
What makes Mounjaro different from Wegovy?
Mounjaro is a dual GIP and GLP-1 receptor agonist, while Wegovy is a GLP-1 agonist only. In clinical trials, Mounjaro showed slightly higher average weight loss (around 20.9% at maximum dose) compared to Wegovy (around 14.9%), but individual results vary significantly.
Are weight loss injections safe?
All three licensed UK weight management injections have been through clinical trials and MHRA approval. Common side effects include nausea and digestive changes. Serious side effects are rare but can occur. Your prescriber will assess whether treatment is safe for you based on your health history, and you'll need to be monitored during treatment.
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.