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 Tea Helps With Weight Loss?
Several types of tea may support weight loss when combined with a healthy diet and increased physical activity. Green tea, black tea, and certain herbal infusions contain compounds that evidence suggests can boost metabolism, reduce appetite, and support fat oxidation. However, tea alone won't cause significant weight loss — it works best as part of an overall weight management strategy. This guide explores the science behind slimming teas and how to use them effectively in your UK weight loss plan.
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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.
Best Teas For Weight Loss and Their Benefits
Green tea contains catechins and caffeine, which research suggests may modestly increase fat burning and thermogenesis (heat production). Studies show green tea drinkers may lose slightly more weight than control groups, but effects are small — typically around 1–3 kg over 12 weeks alongside diet changes.
Black tea offers similar benefits to green tea through its caffeine and polyphenol content. It may help reduce calorie intake by promoting satiety and can support cardiovascular health, which is important for overall weight management in the UK context.
Herbal teas like peppermint, ginger, and hibiscus may support digestion, reduce bloating, and help with appetite control. Ginger tea specifically has evidence for reducing nausea and supporting metabolism, making it useful during any significant diet changes.
Oolong tea falls between green and black tea in oxidation and contains compounds that may support fat oxidation, particularly when combined with regular physical activity.
Use our free BMI calculator above to establish your current weight status, then track changes alongside tea consumption and lifestyle adjustments using our progress tracker.
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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.
How to Use Tea Effectively For Weight Loss
Tea works best as part of a structured approach to weight management in the UK. Drink 2–3 cups daily of your chosen tea without added sugar or high-calorie milk — this is key, as sugary tea can undermine weight loss efforts. Combine tea consumption with a reduced-calorie diet (around 500 kcal deficit per day supports approximately 0.5 kg weekly loss according to NHS guidance) and increased physical activity.
Important: Tea is a supplement to weight loss, not a replacement for dietary changes. If you're considering prescription weight loss medication like GLP-1 injections (used for prescription weight loss in the UK), discuss this with your GP alongside any dietary supplements you're taking. Check your current BMI using our free weight converter and BMI calculator to understand your starting point, then set realistic goals with your healthcare provider.
- 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 you lose weight?
Green tea contains catechins and caffeine that research shows may modestly support fat burning. Studies suggest drinkers lose approximately 1–3 kg more than control groups over 12 weeks, but only when combined with diet and exercise. It's a helpful supplement, not a solution on its own.
How much tea should I drink daily for weight loss?
Aim for 2–3 cups of unsweetened tea daily. Drinking more won't increase benefits significantly. Avoid adding sugar, honey, or high-calorie milk, as these can negate weight loss efforts. Consistency over several weeks is more important than quantity.
Is herbal tea better than green tea for weight loss?
Both have benefits. Green and black tea offer caffeine and catechins for metabolism support, while herbal teas like ginger and peppermint may aid digestion and appetite control. Choose based on personal preference and what you'll drink consistently.
Can tea replace exercise and diet changes for weight loss?
No. Tea is most effective as part of a comprehensive approach including reduced-calorie diet and physical activity. The NHS recommends losing 0.5–1 kg weekly through combined lifestyle changes — tea supports this but cannot replace these fundamentals.
Should I drink tea if I'm taking weight loss medication like Wegovy?
Yes, tea is safe alongside prescription weight loss injections. Wegovy (semaglutide) is a GLP-1 medication that works by reducing appetite; adding supportive habits like tea and regular movement enhances results. Always inform your prescriber of all supplements and dietary changes.
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.