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 Green Tea Helps in Weight Loss
Green tea is often promoted as a natural aid for weight management, but what does the evidence actually show? Green tea contains compounds called catechins and caffeine that may support weight loss when combined with a healthy diet and exercise. While green tea alone won't lead to significant weight loss, it can be a useful addition to a broader weight management strategy. Understanding how green tea works, alongside other proven methods like calorie reduction and physical activity, helps you make informed decisions about your health and weight management UK approach.
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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.
How Green Tea Supports Weight Management
Green tea contains catechins — naturally occurring compounds with potential fat-burning properties — and caffeine, which may boost metabolism slightly. Research suggests that regular green tea consumption, particularly when combined with exercise, may help support modest weight loss or prevent weight gain.
- Green tea's catechins may increase fat oxidation (fat burning), especially during physical activity
- Caffeine in green tea can modestly increase energy expenditure and may reduce appetite
- The combination of catechins and caffeine appears more effective than either compound alone
- Most studies show an average weight loss of 1.3 kg over 8–12 weeks when green tea is combined with diet and exercise
- Green tea may also support cardiovascular health and blood sugar management, which are important for overall weight management UK
However, green tea is not a substitute for lifestyle changes. The NHS emphasises that sustainable weight loss requires a calorie deficit through reduced-calorie diet and increased physical activity. Green tea can complement these efforts, but results vary significantly between individuals.
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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.
Green Tea vs. Prescription Weight Loss Options
While green tea may provide modest metabolic support, it's important to understand that prescription weight loss medications work through different mechanisms. For adults with a BMI of 30 or above, or 25–29.9 with weight-related health conditions, NHS-approved prescription options like GLP-1 weight loss injections may be considered following clinical assessment.
Green tea is best viewed as a complementary lifestyle choice rather than a primary weight loss tool. It can be part of a balanced approach alongside reduced-calorie eating, regular exercise, and, if appropriate, prescription weight loss medication. Use our free BMI calculator above to check your personal weight category, and our GLP-1 weight loss calculator to explore options if prescription support might be relevant for you. Always speak with your GP about weight management strategies suitable for your individual health.
- 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 really help you lose weight?
Green tea contains catechins and caffeine that may slightly boost metabolism and support fat burning, particularly when combined with exercise and a calorie-reduced diet. Clinical trials show modest weight loss of around 1.3 kg over 8–12 weeks when green tea is part of a broader weight management strategy. However, green tea alone is not effective for significant weight loss.
How much green tea should I drink for weight loss?
Most research studies used 2–3 cups of green tea daily (providing 200–300 mg of catechins). Drinking more than 3–4 cups daily may cause caffeine-related side effects like jitteriness or sleep disruption. Always consult your GP if you're pregnant, breastfeeding, or taking medications that interact with caffeine.
Can I use green tea instead of changing my diet and exercise?
No. Green tea is a complementary addition, not a replacement for lifestyle changes. The NHS recommends losing weight at 0.5–1 kg per week through a calorie deficit and increased physical activity. Green tea may help slightly, but dietary changes and exercise are essential for sustainable weight loss.
Is green tea safe to drink daily?
For most UK adults, 2–4 cups of green tea daily is safe and well-tolerated. Green tea contains caffeine, so some people may experience mild jitteriness or sleep issues. If you have caffeine sensitivity, iron deficiency, or are taking certain medications, speak with your GP before increasing green tea consumption.
Should I try green tea or prescription weight loss medication?
That depends on your individual health and weight. Green tea is a safe, low-risk addition to any weight management plan. Prescription weight loss medications (like GLP-1 injections) may be appropriate if you have a BMI of 30 or above, or 27.5–29.9 with weight-related health conditions, but these require a clinical assessment from your GP or a licensed prescriber.
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.