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
Can Drinking Tea Help With Weight Loss?
Tea alone won't cause significant weight loss, but certain types may support your weight management efforts when combined with a reduced-calorie diet and increased physical activity. Green tea, black tea, and herbal options contain compounds that research suggests may have modest metabolic benefits. However, relying on tea as a primary weight loss strategy is unlikely to be effective. For sustainable weight loss, most NHS guidance recommends combining dietary changes with lifestyle adjustments—and for some people, prescription weight loss medication may be appropriate alongside these changes.
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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.
Types of Tea and Weight Loss Evidence
Green tea contains catechins and caffeine, compounds that some studies suggest may slightly increase fat oxidation and thermogenesis (heat production). A meta-analysis showed green tea extract may support modest weight loss—typically 1–3 kg over several months—but only when combined with a calorie deficit. The effect is small and individual results vary significantly.
Black tea and oolong tea also contain antioxidants and caffeine, which may have minor metabolic effects. Oolong tea in particular has shown promise in some studies for modest improvements in weight management.
Herbal teas like peppermint, ginger, and hibiscus may aid digestion and reduce appetite slightly, but evidence is limited and effects are minimal without dietary changes.
The key point: tea may provide marginal support, but it is not a standalone weight loss solution. Any benefit depends entirely on maintaining a calorie deficit overall.
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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 and Weight Management Context
Drinking tea can be part of a healthy lifestyle—it's calorie-free (if unsweetened), hydrating, and may have antioxidant benefits. However, adding sugar, milk, or high-calorie syrups will negate any weight loss benefit. Tea works best as a complement to proven weight loss methods: a reduced-calorie diet, regular physical activity, and—if appropriate—prescription weight loss medication.
For sustainable weight management in the UK, the NHS recommends aiming for a loss of 0.5–1 kg per week through diet and exercise. If you're living with obesity or overweight with health complications, your GP can refer you to specialist weight management services where prescription options like GLP-1 medications (such as Mounjaro or Wegovy) may be considered. Use our free BMI calculator above to check your personal BMI and understand your starting point. Our GLP-1 weight loss calculator can help you explore potential outcomes with prescription medication if appropriate for you.
- 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 help you lose weight?
Green tea contains catechins and caffeine that may slightly increase fat burning and metabolism. Research shows modest effects—typically 1–3 kg over several months—but only when combined with a reduced-calorie diet. Tea alone will not cause meaningful weight loss without calorie deficit and lifestyle changes.
Is tea better for weight loss than water?
Both are equally hydrating and calorie-free if unsweetened. Tea has the added benefit of antioxidants and potential minor metabolic effects, while water has no calories and supports hydration. Either is fine; the key is avoiding sugary drinks and maintaining a calorie deficit overall.
How much tea should I drink daily for weight loss?
There is no clinically supported amount. If you enjoy tea, 2–4 cups daily is safe for most adults and may provide modest antioxidant benefits. However, excessive caffeine (over 400 mg daily) can cause sleep disruption or anxiety. Tea should never replace a balanced diet and exercise—it's a supplement, not a solution.
Can tea replace diet and exercise for weight loss?
No. Tea cannot replace the essential combination of calorie deficit, balanced nutrition, and physical activity. For sustainable weight management, the NHS recommends losing 0.5–1 kg per week through lifestyle changes. If lifestyle alone isn't effective, your GP can discuss prescription weight loss options.
What about herbal tea for weight loss?
Herbal teas like peppermint and ginger may aid digestion and reduce appetite slightly, but evidence is limited. They are calorie-free and can support hydration, but they are not proven weight loss aids. Any benefit is marginal without a proper calorie deficit and exercise routine.
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.