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
How Much Green Tea Should You Drink for Weight Loss?
Green tea is often promoted for weight loss, but the evidence is modest. Research suggests green tea may support a small amount of weight loss when combined with a calorie deficit and physical activity — not as a standalone solution. The amount matters: most studies showing benefits used 2–3 cups daily (roughly 200–300mg of catechin compounds). However, achieving your ideal weight for your height depends far more on calorie balance, diet quality, and lifestyle than on any single beverage. Use our free BMI calculator above to find your healthy weight range and understand where you currently sit — this gives you a clear target to work towards.
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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.
Understanding Green Tea and Weight Loss — What the Evidence Shows
Green tea contains compounds called catechins and caffeine which may slightly increase fat burning and metabolism. A 2012 meta-analysis in the American Journal of Clinical Nutrition found that green tea drinkers lost an average of 1.3 kg more than non-drinkers over 12 weeks — but this is modest compared to the impact of diet and exercise.
- Typical dose: 2–3 cups daily (around 200–300mg catechins) showed benefits in studies
- Timing: Spread throughout the day rather than all at once
- Type: Brewed green tea is more effective than extracts or supplements
- Combined approach: Green tea works best alongside a reduced-calorie diet and increased activity
Green tea is not a weight loss treatment — it's a supportive beverage that may contribute to a small additional loss when your overall lifestyle supports weight loss. Your NHS healthy weight range depends on your height and age, not on beverages. Calculate your personal healthy weight using the BMI calculator on this page.
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.
If You're Above Your Healthy Weight Range — What to Do
If our BMI calculator shows you're above the healthy weight range for your height, green tea alone won't address this. The evidence shows sustainable weight loss requires a calorie deficit (eating fewer calories than you burn), increased physical activity, and consistent lifestyle changes.
- Aim for a deficit of around 500 kcal per day for steady loss of approximately 0.5–1 kg per week
- Combine green tea with whole foods, lean protein, and vegetables
- Increase walking, swimming, or other activities you enjoy
- Track your progress using our free progress tracker
- If you struggle with weight management, speak to your GP about support options
Your GP can discuss whether prescription weight loss treatments might be appropriate alongside lifestyle changes if needed.
- 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.
How many cups of green tea per day for weight loss?
Most research showing weight loss benefits used 2–3 cups daily (around 200–300mg of catechins). More than this doesn't necessarily improve results. Consistency matters more than quantity — drinking it daily, spread throughout the day, is more effective than occasional use.
Does green tea alone cause weight loss?
No. Green tea may support a small additional weight loss (around 1–2 kg over several weeks) when combined with a calorie deficit and exercise. It's not a weight loss solution on its own — sustainable weight loss requires reducing overall calorie intake and increasing physical activity.
When should I drink green tea for weight loss?
Spread consumption across the day rather than drinking it all at once. Morning, midday, and early evening work well. Avoid drinking large amounts late in the day as the caffeine may affect sleep, and poor sleep can interfere with weight management.
What's my healthy weight for my height?
Your healthy weight depends on your height, age, and body composition. Use our free BMI calculator above — it shows you the healthy weight range for your specific height. For adults, an NHS healthy weight typically means a BMI between 18.5 and 24.9. Your GP can discuss your personal target.
Should I use green tea extract or supplements instead of brewed tea?
Brewed green tea is more effective than extracts or supplements in studies. It also provides hydration and contains other beneficial compounds. If you prefer supplements, speak to your GP first, as they can interact with some medications or health conditions.
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.