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
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Best Tea Cleanse For Weight Loss — What the Evidence Shows
Tea cleanse products are heavily marketed for weight loss, but the evidence for their effectiveness is limited. While certain teas may offer modest metabolic support and hydration benefits, they are not a weight loss solution on their own. If you're serious about weight management in the UK, understanding what actually works — from lifestyle changes to prescription weight loss options — is far more helpful than relying on tea alone.
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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.
Do Tea Cleanses Actually Support Weight Loss?
The concept of a "cleanse" is largely a marketing term. Your liver and kidneys already filter waste naturally, so specialised tea products cannot genuinely "cleanse" your body. However, certain teas do contain compounds that may offer modest benefits:
- Green tea — Contains catechins and caffeine, which may slightly increase fat oxidation and metabolism. Studies suggest a modest effect of 2–3% increase in calorie burn.
- Black tea — Similar catechin content to green tea, though slightly lower. Caffeine content may provide a small metabolic boost.
- Oolong tea — Falls between green and black tea in terms of oxidation and catechin content. Some evidence for modest weight management support when combined with diet and exercise.
- Herbal teas (peppermint, ginger) — May support digestion and reduce bloating, but do not directly cause weight loss.
The reality: any weight loss from tea is marginal — typically less than 1kg over 12 weeks in clinical trials — and only when combined with a reduced-calorie diet and physical activity. Tea alone will not create the calorie deficit needed for meaningful weight 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.
Evidence-Based Alternatives For Effective Weight Management
For sustainable weight loss in the UK, the NHS recommends a calorie deficit of around 500 kcal per day, which typically results in losing 0.5–1 kg per week. This is achieved through a combination of dietary changes and increased physical activity.
If lifestyle changes alone are not sufficient, speak to your GP about evidence-based options. These include NHS-supported weight loss programmes, behaviour change support, or in some cases, prescription weight loss medication such as GLP-1 injections. Our free BMI calculator can help you understand your current health status, and our GLP-1 weight loss calculator can show you potential outcomes with medical support. For weight tracking, use our progress tracker to log your journey over time.
- 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.
Do tea detox drinks actually work for weight loss?
Tea detox products are largely marketing hype. While certain teas like green tea contain compounds that may slightly boost metabolism (2–3%), the effect is minimal — typically under 1kg weight loss over several months. Any benefit occurs only when combined with a reduced-calorie diet and exercise. Tea alone cannot create the calorie deficit needed for meaningful weight loss.
Which tea is best for weight management?
Green tea, black tea, and oolong tea contain catechins and caffeine that may provide modest metabolic support. Herbal teas like ginger and peppermint may aid digestion and reduce bloating but do not directly cause weight loss. All are beneficial as part of a healthy lifestyle, but none are weight loss solutions on their own.
How much weight can I lose from drinking tea?
Clinical trials show tea provides negligible direct weight loss — typically less than 1kg over 12 weeks. Any weight loss occurs because drinking tea replaces higher-calorie drinks (like sugary soft drinks), not because the tea itself burns fat. The key to weight loss is creating a calorie deficit through diet and exercise, not through tea alone.
Is NHS weight loss support available in the UK?
Yes. The NHS offers tiered weight management support, starting with self-help tools and digital programmes (Tier 1), then primary care interventions (Tier 2), specialist services (Tier 3), and in some cases bariatric surgery (Tier 4). Speak to your GP to access support appropriate for your needs.
What's more effective than tea for weight loss?
Evidence-based approaches include a structured reduced-calorie diet (500 kcal daily deficit), regular physical activity, behaviour change support, and in some cases, prescription weight loss medication. Prescription GLP-1 injections such as Mounjaro and Wegovy are now available in the UK and show average weight loss of 15–21% body weight in clinical trials — far more effective than any tea product.
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.