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
Best Weight Loss Tea — What the Evidence Shows
Weight loss tea is often promoted as a natural way to support weight management, but the scientific evidence is modest. While certain teas contain compounds that may boost metabolism slightly, they're not a substitute for sustainable lifestyle changes like reduced-calorie eating and physical activity. If you're looking for NHS weight loss support or prescription options, those have stronger evidence backing. This guide explains what research actually shows about tea for weight loss in the UK context.
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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.
Which Teas May Help With Weight Management?
Several types of tea contain compounds that may modestly support weight loss efforts:
- Green tea: Contains catechins and caffeine, which small studies suggest may increase fat oxidation by 4–5%. Effect is mild and requires regular consumption.
- Black tea: Similar compounds to green tea, with modest thermogenic effects reported in research.
- Oolong tea: Some evidence suggests it may sit between green and black tea in terms of metabolism support.
- Herbal teas (ginger, hibiscus, peppermint): May aid digestion and reduce bloating, but don't directly cause fat loss.
Important: Tea alone will not produce significant weight loss. The NHS emphasises that sustainable weight management requires a calorie deficit alongside increased physical activity. Using our free BMI calculator can help you understand your current weight status and set realistic goals.
Clinically BackedWeight 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.
How Effective Is Tea for Weight Loss?
Realistically, weight loss tea has very limited effectiveness. Research shows green tea may contribute to a loss of 0.5–1.5 kg over several months when combined with diet and exercise — but the same results occur without the tea. Tea is not a weight loss medication or substitute for lifestyle change.
If you're seeking more robust weight loss support in the UK, the NHS pathway includes tier 1 self-help, tier 2 behaviour change programmes, and tier 3 specialist services where prescription weight loss options like GLP-1 injections may be considered. Our GLP-1 weight loss calculator can help you explore what results might look like with evidence-based medication. Tea works best as part of a hydration strategy — not as a primary weight loss tool.
- 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 compounds called catechins that may slightly boost metabolism and fat burning. Studies show modest effects — typically contributing to 0.5–1.5 kg loss over months when combined with diet and exercise. It's not a weight loss solution on its own, but a healthy addition to a balanced routine.
What's the best weight loss tea to drink?
Green tea and oolong tea have the most scientific support due to their catechin content. However, the "best" tea is one you'll drink regularly and enjoy. Choose unsweetened versions — adding sugar undermines any potential benefit. Consistency matters more than the specific type.
How much tea should I drink daily for weight loss?
Research suggesting benefits typically involved 2–3 cups of green tea daily over several months. Drinking excessive amounts won't accelerate results and may cause caffeine-related side effects. Pair tea with water, balanced meals, and activity for best outcomes.
Can weight loss tea replace exercise or diet changes?
No. Tea is not a substitute for the calorie deficit and physical activity required for sustainable weight loss. The NHS recommends 0.5–1 kg weight loss per week, which requires dietary changes and movement. Tea can support these efforts but won't work alone.
Are there prescription weight loss options in the UK if tea isn't enough?
Yes. If you have a BMI of 30 or above (or 27+ with weight-related health conditions), you may be eligible for NHS specialist weight management services or prescription medications like GLP-1 injections. These have much stronger evidence than tea. Speak to your GP about referral to tier 3 services or explore private options.
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.