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
Best Green Tea to Drink for Weight Loss
Green tea has long been promoted for weight loss, but evidence for significant results is modest. While green tea contains compounds that may support metabolism, sustainable weight management in the UK typically involves a combination of dietary changes, physical activity, and — for eligible adults — prescription weight loss medication. This guide explores green tea's role in weight management and introduces more effective prescription options available through the NHS and privately.
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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
If you're looking for proven weight loss support beyond green tea, the UK offers several prescription-only medications that have demonstrated clinical effectiveness. Mounjaro (tirzepatide) and Wegovy (semaglutide) are dual and single GLP-1 receptor agonist injections, respectively, that work by reducing appetite and supporting feelings of fullness. Saxenda (liraglutide) is a daily injectable option. These prescription medications are available for adults with a BMI of 30 or above, or 27–29.9 with weight-related health conditions such as type 2 diabetes, high blood pressure, or cardiovascular disease.
Clinical trials show these medications can help with an average weight loss of 15–21% of body weight when used alongside a reduced-calorie diet and increased physical activity. You can estimate potential weight loss with our GLP-1 weight loss calculator, which helps you understand realistic outcomes at different doses. Eligibility varies based on your individual health profile, and a prescriber will assess whether medication is suitable for you.
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 vs Private Access to Weight Loss Medication
In the UK, prescription weight loss medications are available through two routes. NHS access is through specialist tier 3 weight management services following a GP referral, though waiting times and regional availability vary significantly. Private access is available through online consultations with UK-licensed prescribers, without requiring NHS referral, though costs typically range from £129–£320 per month depending on dose.
To find out if you're eligible, check your BMI using our free BMI calculator above, and discuss weight management options with your GP. Your doctor can advise whether prescription medication is appropriate for your health profile and help you understand the NHS vs private route best suited to your circumstances.
- 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.
Does green tea actually help with weight loss?
Green tea contains compounds like catechins that may slightly boost metabolism, but the effect is modest. Research shows green tea alone produces minimal weight loss — typically less than 1kg over several months. It can be part of a healthy lifestyle, but prescription weight loss medication or significant dietary changes produce more substantial results.
What is the best green tea brand for weight loss UK?
No specific green tea brand is proven superior for weight loss. Matcha, sencha, and standard green tea all contain similar active compounds. Quality matters more than brand — look for loose leaf or high-quality tea bags. However, green tea should be viewed as a supplement to lifestyle changes, not a standalone weight loss solution.
How much green tea should I drink daily for weight loss?
Studies on green tea typically used 2–3 cups daily (containing around 300mg catechins). However, drinking more green tea won't dramatically accelerate weight loss. Excess caffeine can cause sleep disruption or anxiety. If you enjoy green tea, include it as part of a balanced diet, but don't rely on it as your primary weight management strategy.
Is green tea better than prescription weight loss medication?
No. Green tea has minimal weight loss effects, while prescription medications like Mounjaro and Wegovy show clinical weight loss of 15–21% in trials. If you're eligible for prescription weight loss treatment (BMI 30+, or 27+ with health conditions), discuss options with your GP. Green tea can complement medication but cannot replace it.
How do I check if I'm eligible for prescription weight loss medication in the UK?
Use our free BMI calculator to determine your BMI. If it's 30 or above, or 27–29.9 with weight-related conditions (diabetes, high blood pressure, cardiovascular disease), you may be eligible. Speak to your GP about referral to specialist weight management services, or explore private prescribing options through a licensed online provider.
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.