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
Does Tea Detox Really Help You Lose Weight?
Tea detox for weight loss is a popular trend, but the evidence for sustained weight loss is limited. While certain teas may have modest benefits — like green tea's mild metabolic effects — they are not a substitute for proven weight loss strategies. The NHS recommends focusing on calorie deficit, physical activity, and sustainable lifestyle changes for effective weight management in the UK. Our free BMI calculator above can help you understand your current weight status and set realistic goals.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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 "Detox Tea" Actually Do?
Detox teas typically contain herbs like green tea, ginger, dandelion, or senna, marketed as ways to "cleanse" the body and boost metabolism. In reality, your liver and kidneys already detoxify your body naturally — no special tea required. However, some teas do have minor health benefits:
- Green tea: Contains catechins which may slightly increase fat oxidation and metabolic rate by around 3–5%. This is modest compared to the calorie deficit needed for real weight loss.
- Ginger tea: May improve digestion and reduce bloating, but does not promote fat loss.
- Senna: A natural laxative that causes temporary water loss, not true fat loss — and frequent use is not recommended.
For actual weight management in the UK, the NHS emphasizes that sustainable loss requires a calorie deficit of around 500 kcal per day, which typically results in losing 0.5–1 kg per week. Try our weight converter above to track how losses add up in stone and pounds.
Clinically BackedWeight Loss
No appointments. No waiting rooms. Just care — from a UK-regulated online pharmacy.
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.
Effective Alternatives to Detox Tea
If you're looking for genuine weight loss support, evidence-based approaches are far more effective. These include:
- Dietary changes: Focus on whole foods, protein, and fibre — not restrictive "detox" regimes.
- Physical activity: Combine cardio and strength training for sustainable results.
- Prescription weight loss medication: If eligible, GLP-1 weight loss injections like semaglutide (Wegovy) can support significant weight loss alongside diet and exercise. Clinical trials showed participants lost an average of around 15% of body weight — though individual results vary.
- Professional support: Your GP can refer you to NHS tier 3 weight management services or discuss prescription weight loss options if appropriate.
Use our GLP-1 weight loss calculator to explore whether prescription weight loss support might be right for you, and check your BMI status with our free 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.
Do detox teas really help you lose weight?
Limited evidence supports detox teas for weight loss. While green tea may have modest metabolic effects (3–5%), this is minimal compared to the calorie deficit required for real weight loss. The term "detox" is largely marketing — your liver and kidneys already detoxify naturally. True weight loss requires a consistent calorie deficit and lifestyle changes.
Is senna tea safe for weight loss?
Senna is a natural laxative that causes temporary water loss, not fat loss. It should not be used regularly for weight management. Frequent use can damage digestive health and lead to dependence. The NHS does not recommend laxatives for weight loss — sustainable approaches work better.
What's the best way to lose weight according to the NHS?
The NHS recommends losing 0.5–1 kg per week through a combination of reduced-calorie diet, increased physical activity, and behaviour change. For some people, prescription weight loss medication may be offered through specialist NHS weight management services if BMI is 30 or above (or 27+ with health conditions).
Can I use tea detox alongside other weight loss methods?
Tea itself is fine as part of a healthy diet, but do not rely on detox teas as your primary weight loss strategy. Focus instead on proven methods: calorie deficit, exercise, and professional support. If eligible, your GP can discuss prescription options or refer you to weight management services in the UK.
How does prescription weight loss medication compare to detox tea?
Prescription GLP-1 medications like semaglutide (Wegovy) are far more effective — clinical trials showed average weight loss of around 15% of body weight. Unlike detox tea, these are prescription-only medicines requiring clinical assessment, typically used alongside diet and exercise. Results vary individually, but evidence is strong.
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.