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
Which Teas Support Weight Loss?
Several teas may support weight loss when combined with a reduced-calorie diet and physical activity. Green tea, black tea, and herbal options like oolong contain compounds that can boost metabolism and promote fat oxidation. However, tea alone won't cause significant weight loss—sustainable weight management in the UK requires a comprehensive approach combining dietary changes, exercise, and sometimes medical support. If you're considering prescription weight loss medication alongside lifestyle changes, our GLP-1 weight loss calculator can help you understand potential outcomes.
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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.
Teas with Evidence for Weight Management Support
Green tea contains catechins and caffeine, which research suggests may slightly increase fat burning and metabolic rate. A meta-analysis found green tea users lost an average of 1–3 kg over 12 weeks, though results are modest. Black tea and oolong tea (a traditional Chinese tea falling between green and black) also contain caffeine and polyphenols that may support modest weight loss. Herbal options like peppermint tea may aid digestion and reduce bloating sensations, whilst ginger tea may support appetite regulation.
- Green tea: 2–3 cups daily, best without sugar or milk to preserve catechins
- Black tea: Contains similar compounds to green tea but in slightly lower concentrations
- Oolong tea: Often cited as particularly supportive for fat oxidation
- Herbal teas: Peppermint, ginger, and hibiscus offer additional digestive and wellness benefits
Important: Tea is a supplement to weight loss, not a replacement for calorie reduction or exercise. The NHS emphasises that sustainable weight loss requires a 500 kcal daily deficit, typically resulting in 0.5–1 kg weekly loss.
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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.
Tea, Weight Management, and Prescription Options
Drinking tea can be part of a healthy routine, but for significant weight loss support, many people combine lifestyle changes with evidence-based medical options. GLP-1 weight loss injections like Mounjaro and Wegovy may help when prescribed alongside diet and exercise, offering more substantial support than tea alone. In clinical trials, Mounjaro helped participants lose an average of 15–21% of body weight, whilst Wegovy showed approximately 15% average weight loss—though individual results vary significantly.
If you're exploring weight management options, use our free BMI calculator to understand your current health baseline, and discuss prescription weight loss treatment with your GP. Your healthcare provider can assess whether medication is appropriate for you and create a comprehensive weight management plan combining multiple approaches.
- 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 called catechins that may modestly boost metabolism and fat burning. Research shows users typically lose 1–3 kg over 12 weeks when combined with diet and exercise—helpful but not dramatic. Tea works best as part of a comprehensive weight management approach rather than a standalone solution.
How much tea should I drink daily for weight loss benefits?
For green tea, 2–3 cups daily is a standard recommendation. Drinking more won't accelerate results and may increase caffeine-related side effects like jitteriness. Consistency matters more than quantity—regular, modest consumption is more sustainable than excessive intake.
Can tea replace exercise and calorie reduction for weight loss?
No. Tea is a minor supporting tool, not a replacement for the fundamentals of weight loss. The NHS recommends a 500 kcal daily deficit and regular physical activity for sustainable 0.5–1 kg weekly loss. Tea may enhance these efforts slightly but cannot substitute for them.
Is black tea or green tea better for weight loss?
Green tea contains slightly higher catechin concentrations and is more studied for weight loss. However, black tea and oolong tea also offer metabolism-supporting compounds. Choose whichever you prefer—consistency and enjoying your tea matters more than picking the "perfect" variety.
What if tea isn't giving me the weight loss results I want?
If diet, exercise, and tea aren't producing results, discuss weight loss options with your GP. For BMI 30 or above (or 27 with health conditions), you may be eligible for NHS specialist weight management services or prescription GLP-1 medication like Mounjaro or Wegovy through private prescribing.
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.