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
Fenugreek in Weight Loss — What UK Health Guidance Says
Fenugreek is a traditional herb that some people use as a natural supplement for weight management, but evidence of its effectiveness is limited. If you're looking for clinically proven support for weight management in the UK, prescription medications and NHS weight loss services offer much stronger evidence-based options. This guide explains what fenugreek is, why evidence is mixed, and which prescription alternatives are available if you're eligible.
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.
UK-Licensed Prescription Weight Management Options
If you're interested in weight management medication in the UK, several prescription weight loss injections have been licensed by the MHRA with substantial clinical evidence behind them:
- Mounjaro (tirzepatide) — a dual GIP and GLP-1 receptor agonist; clinical trials showed participants lost an average of 15–21% of body weight over 72 weeks alongside reduced-calorie diet and exercise
- Wegovy (semaglutide) — a GLP-1 receptor agonist; STEP trial data showed average weight loss of approximately 15% of body weight at 68 weeks
- Saxenda (liraglutide) — a daily GLP-1 injection; clinical evidence supports modest sustained weight loss
All three are prescription-only and require a clinical assessment to determine eligibility. Individual results vary significantly, and these medications work best alongside lifestyle changes including reduced-calorie diet and increased physical activity.
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.
Eligibility and How to Access Weight Loss Support in the UK
You may be eligible for prescription weight management medication if you have a BMI of 30 or above, or a BMI of 27–29.9 with weight-related health conditions such as type 2 diabetes, high blood pressure, or cardiovascular disease. Lower thresholds apply for adults of South Asian, Chinese, Black African, or Black Caribbean heritage. Access is through NHS specialist weight management services (tier 3) via GP referral, or through private online prescribing following a clinical assessment. Use our free BMI calculator to check your starting point, and speak with your GP about which weight management pathway suits your situation.
- 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 fenugreek proven to help with weight loss?
Fenugreek has been used in traditional medicine, but clinical evidence for weight loss is limited and inconsistent. Some small studies suggest modest effects on appetite, but results are not comparable to prescription weight loss medications licensed in the UK. If you're seeking evidence-based weight management support, speak to your GP about prescription options.
What's the difference between fenugreek and prescription weight loss medication?
Fenugreek is an unregulated herbal supplement with weak clinical evidence. Prescription weight loss medications like Mounjaro and Wegovy are MHRA-licensed, have undergone rigorous clinical trials, and show significant average weight loss of 15–21%. They require a prescription and clinical assessment to ensure safety and suitability.
How do I know if I'm eligible for prescription weight loss treatment on the NHS?
You may be eligible if you have a BMI of 30 or above, or 27+ with weight-related health conditions. Access is through NHS specialist weight management services following a GP referral. Availability varies by region. Your GP can assess your eligibility and discuss the best pathway for your situation.
Can I use the GLP-1 weight loss calculator on MyWeightCheck to estimate my results?
Yes. Our free GLP-1 weight loss calculator helps you estimate potential weight loss at different prescription doses based on clinical trial averages. This can help you understand realistic expectations. Remember that individual results vary, and results are achieved alongside reduced-calorie diet and increased physical activity.
What's the NHS pathway for weight management?
The NHS offers a tiered approach: tier 1 (self-help and community programmes), tier 2 (primary care behaviour change), tier 3 (specialist multidisciplinary services where prescription medication may be considered), and tier 4 (bariatric surgery for severe obesity). Waiting times and availability vary significantly by region. Your GP can advise on local options.
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.