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 Moringa Good For Weight Loss?
Moringa is a nutrient-rich plant supplement that some people use for health support, but scientific evidence for weight loss specifically is limited. While moringa contains vitamins and minerals, weight management in the UK typically relies on proven approaches: calorie reduction, physical activity, and for eligible adults, prescription weight loss medications like Mounjaro and Wegovy. If you're considering weight loss options, it's worth speaking to your GP about what's clinically supported for your situation.
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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.
Prescription Weight Loss Options Available in the UK
If you're looking for evidence-based weight management in the UK, prescription medications offer clinical support for eligible adults. Three licensed options are currently available:
- Mounjaro (tirzepatide) — a once-weekly injection that activates dual GIP and GLP-1 pathways. Clinical trials showed average weight loss of 15–21% of body weight over 72 weeks.
- Wegovy (semaglutide) — a once-weekly GLP-1 injection with average weight loss of approximately 15% of body weight in trials.
- Saxenda (liraglutide) — a daily GLP-1 injection, the longest-established option in this class.
All are prescription-only and require clinical assessment. These medications work alongside a reduced-calorie diet and increased physical activity — they're not replacements for lifestyle change. Results vary between individuals, and not everyone loses the same amount of weight.
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.
NHS Access and Private Options: How to Find Out If You're Eligible
In the UK, prescription weight loss medication is available through two routes. The NHS route involves referral to a specialist tier 3 weight management service from your GP, though access and waiting times vary significantly by region. The private route is available through GPhC-registered online prescribers without NHS referral, following a clinical assessment.
To find out if you're eligible, start by speaking to your GP about your weight management goals. You can also use our free BMI calculator above to understand your current BMI and eligibility threshold — adults with a BMI of 30 or above, or 27 or above with weight-related health conditions, may be candidates for prescription treatment. Your GP can discuss which option suits your situation best.
- 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 moringa scientifically proven to help with weight loss?
Moringa contains nutrients and antioxidants, but clinical evidence specifically supporting weight loss is limited. It is not a licensed weight loss treatment in the UK. For proven options, prescription medications like GLP-1 injections have robust clinical trial data demonstrating meaningful weight loss results.
What's the difference between Mounjaro and Wegovy for weight loss?
Both are once-weekly injections for weight management. Mounjaro (tirzepatide) is a dual GIP/GLP-1 agonist with average weight loss of 15–21% in trials. Wegovy (semaglutide) is a GLP-1 agonist with average weight loss around 15%. Both require prescription and clinical assessment. Your GP or prescriber can advise which suits you.
Can I get prescription weight loss medication through the NHS?
Yes. NHS specialist tier 3 weight management services can prescribe Mounjaro, Wegovy, or Saxenda for eligible adults. You typically need referral from your GP. Access varies by region and waiting times can be lengthy. Private online prescribing is also available without NHS referral.
What makes someone eligible for prescription weight loss treatment in the UK?
Generally, adults with a BMI of 30 or above, or a BMI of 27–29.9 with weight-related health conditions (diabetes, high blood pressure, heart disease, sleep apnoea), may be eligible. Your GP or a prescriber will assess your individual circumstances and medical history to confirm suitability.
How much weight can I expect to lose with prescription medication?
Clinical trials show average weight losses of 15–21% of body weight, but individual results vary significantly. Some people lose more, some less. These medications work best alongside reduced-calorie diet and physical activity. Your GP or prescriber can discuss realistic expectations for your situation.
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.