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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Can Teas Really Help With Detox and Weight Loss?
Many people wonder whether specialised teas can support weight loss or "detox" the body. The truth is more nuanced than marketing claims suggest. While certain teas may offer modest health benefits and can be part of a healthy lifestyle, they are not a weight loss solution on their own. If you're serious about weight management in the UK, understanding what actually works — alongside lifestyle changes — is essential. This guide explores the evidence behind popular weight loss teas and realistic approaches to sustainable weight loss.
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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.
What Does the Evidence Say About Detox Teas?
The concept of "detoxing" through tea is largely a marketing term. Your liver and kidneys naturally detoxify your body — no special tea required. However, some teas do contain compounds with potential health benefits:
- Green tea: Contains catechins and caffeine; some studies suggest a modest boost to fat oxidation, though the effect is small (around 2–3% increase in energy expenditure)
- Oolong tea: May support slightly faster metabolism compared to water, but not significantly
- Black tea: Contains antioxidants and may support heart health, though not specifically for weight loss
- Herbal teas (ginger, peppermint): May ease digestion and reduce bloating, but do not burn fat or create weight loss
The key point: any weight loss effect from tea is marginal without a calorie deficit. NHS weight management guidance emphasises that sustainable loss requires dietary change and increased physical activity — not supplement beverages.
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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 Weight Loss Actually Works in the UK Context
The NHS recommends losing weight at a rate of 0.5 to 1 kg per week through a combination of approaches. A calorie deficit of around 500 kcal per day — achieved through reduced food intake and increased exercise — is the foundation. For adults with a BMI in the overweight or obese range, prescription weight loss medication may be considered alongside lifestyle changes. Calculate your personal BMI using our free BMI calculator above to understand your health context.
If you're exploring weight management options, our GLP-1 weight loss calculator can help you understand evidence-based approaches like prescription medications. Sustainable weight loss combines dietary improvements, physical activity, and — where appropriate — clinical support. Teas can be part of a healthy routine, but they cannot replace these core elements.
- 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 detox teas actually work for weight loss?
Detox teas have minimal direct impact on weight loss. While green and oolong teas contain compounds with modest metabolic effects, any weight loss benefit is very small (2–3%) and only occurs alongside a calorie deficit. No tea alone can create weight loss without dietary and lifestyle changes.
What makes teas claim to "detox" the body?
The term "detox tea" is primarily marketing language. Your liver and kidneys naturally filter and eliminate waste. Tea cannot remove toxins more effectively than your body's own systems. Staying hydrated with water is equally (or more) beneficial than specialised teas.
Is green tea better than other teas for weight loss?
Green tea contains more catechins than black or oolong tea, and some research shows a small boost to fat oxidation. However, the effect is modest — around 50–100 extra calories burned per day at best. It is not a weight loss solution without calorie restriction and exercise.
Can herbal teas like ginger or peppermint help me lose weight?
Ginger and peppermint teas may ease digestion and reduce bloating, making you feel lighter temporarily. However, they do not burn fat or create a calorie deficit. Any perceived weight loss is temporary and related to reduced fluid retention, not actual fat loss.
What should I focus on instead of detox teas for real weight loss?
Focus on creating a sustainable calorie deficit through balanced eating and regular physical activity. The NHS recommends losing 0.5–1 kg per week. For adults meeting NHS eligibility criteria, prescription weight loss medication combined with lifestyle changes may be recommended by a GP or specialist service.
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.