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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Methi Seeds And Weight Loss — UK Prescription Medication Guide
Methi seeds (fenugreek) have been used traditionally to support digestion and blood sugar levels, but there is limited clinical evidence for direct weight loss. If you're looking to manage your weight in the UK, prescription weight management options are now available for eligible adults. NHS-licensed medications like Mounjaro and Wegovy have shown significant results in clinical trials when combined with lifestyle changes. This guide explains your prescription weight loss options and how to find out if you're eligible through your GP.
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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.
UK-Licensed Prescription Weight Loss Options
Three prescription weight loss medications are licensed in the UK for eligible adults: Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide). These are not supplements—they are prescription-only medicines that work by reducing appetite and helping you feel fuller after eating. Clinical trials show significant results: Mounjaro helped patients lose an average of 15–21% of their body weight, whilst Wegovy showed approximately 15% average weight loss over 68 weeks. Eligibility requirements include a BMI of 30 or above, or 27 or above with weight-related health conditions such as type 2 diabetes, high blood pressure, or cardiovascular disease. You can check your BMI instantly using our free BMI calculator. These medications are most effective alongside a reduced-calorie diet and increased physical activity—they support behaviour change rather than replace lifestyle effort.
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 Medication In The UK
In the UK, you can access prescription weight loss medication through two routes. The NHS route involves referral from your GP to a specialist tier 3 weight management service. Availability varies significantly by region, and waiting lists can be lengthy in many areas. The private route offers faster access through GPhC-registered online pharmacies following an online clinical assessment by a UK-licensed prescriber—no NHS referral is needed. Your GP can discuss which option is right for you and assess whether prescription weight loss treatment is appropriate based on your individual health. Use our free GLP-1 weight loss calculator to explore potential results at different medication doses, and track your progress with our free progress tracker once you start 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.
Are methi seeds effective for weight loss on their own?
Methi seeds may support healthy digestion and blood sugar control, but there is no strong clinical evidence that they directly cause weight loss. For proven weight management results, prescription medications like Mounjaro and Wegovy are available in the UK for eligible adults. Your GP can advise on the best approach for your situation.
What is the difference between Mounjaro and Wegovy?
Both are prescription weight loss injections taken once weekly. Mounjaro (tirzepatide) is a dual GIP and GLP-1 agonist, whilst Wegovy (semaglutide) is a GLP-1 agonist only. Clinical trials suggest Mounjaro may produce slightly greater average weight loss, but individual results vary significantly. A prescriber will determine which is most appropriate for you.
How do I know if I'm eligible for prescription weight loss medication in the UK?
You are potentially eligible if you have a BMI of 30 or above, or 27 or above with a weight-related health condition (such as type 2 diabetes, high blood pressure, or cardiovascular disease). Use our free BMI calculator to check your BMI, then speak to your GP about eligibility. South Asian, Chinese, Black African, and Black Caribbean adults may have lower BMI eligibility thresholds.
Can I get weight loss injections through the NHS?
Yes, Mounjaro and Wegovy are available through NHS specialist tier 3 weight management services. You'll need a referral from your GP, and availability varies by region. Alternatively, private online prescribing services offer faster access without an NHS referral. Your GP can discuss both options with you.
How much weight will I lose with prescription weight loss medication?
Results vary significantly between individuals. Clinical trials showed average weight loss of 15–21% of body weight with Mounjaro and approximately 15% with Wegovy over 68 weeks, alongside reduced-calorie diet and increased physical activity. Individual outcomes depend on your starting weight, adherence, lifestyle changes, and personal metabolism. A prescriber will give you realistic expectations based on 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.