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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Detox Tea for Weight Loss: What Works in the UK
Detox teas are widely marketed for weight loss, but evidence for their effectiveness is limited. While some may support hydration and general wellness, sustainable weight management in the UK typically requires a combination of dietary changes, physical activity, and — for eligible adults — prescription medication. This guide explains what detox tea can realistically offer and introduces evidence-based weight management options available to UK adults, including GLP-1 medications and NHS support pathways.
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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.
UK-Licensed Prescription Weight Management Options
If you're exploring weight loss options in the UK, prescription weight loss medications offer clinically proven support for eligible adults. Three medications are currently licensed for weight management in the UK:
- Mounjaro (tirzepatide) — a once-weekly injection that activates two hormone pathways to reduce appetite and support feeling fuller after meals. Clinical trials showed average weight loss of 15–21% of body weight over 72 weeks.
- Wegovy (semaglutide) — a once-weekly GLP-1 injection with average weight loss around 15% of body weight in clinical trials.
- Saxenda (liraglutide) — a daily injection, available through NHS specialist services and private providers.
These are prescription-only medicines requiring a clinical assessment. Eligibility includes adults with a BMI of 30 or above, or BMI 27–29.9 with weight-related health conditions such as type 2 diabetes, high blood pressure, or sleep apnoea. Use our GLP-1 weight loss calculator to explore potential outcomes at different doses.
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.
NHS vs. Private: Finding Your Path to Weight Loss Support
NHS access: Available through tier 3 specialist weight management services. Your GP can refer you, though waiting lists vary significantly by region and can extend several months. NHS provision includes comprehensive support alongside medication.
Private access: Available through GPhC-registered online prescribers without NHS referral. Assessment is conducted online, and medications are dispensed by regulated pharmacies. Costs typically range from £129–£320 monthly depending on dose.
Either route requires a prescriber to assess your individual health. Prescription weight loss medications work best alongside a reduced-calorie diet and increased physical activity — they're a tool to support sustainable lifestyle change, not a replacement for it. Check your BMI using our free BMI calculator to understand where you currently stand on the NHS health weight scale, then discuss options with your GP.
- 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.
Will detox tea actually help me lose weight?
Detox teas may support hydration and contain antioxidants, but they're not proven for weight loss. Weight loss requires a sustained calorie deficit. While a cup of tea has negligible calories, no detox tea ingredient scientifically "burns fat" or "detoxifies" the body — your liver and kidneys handle that naturally. For evidence-based weight loss, focus on dietary changes, physical activity, and speak to your GP about eligibility for prescription weight management options.
What makes detox tea different from regular tea?
Detox teas typically contain herbs like green tea, ginger, or senna, marketed with weight loss claims. While some have mild health benefits — green tea contains catechins with modest metabolism support — the "detox" claim is largely marketing. Your body naturally detoxifies through the liver and kidneys. Regular tea offers similar antioxidants without the premium price tag. If weight loss is your goal, a calorie deficit and lifestyle changes are far more effective.
Is there a prescription weight loss medication available on the NHS in the UK?
Yes. Mounjaro, Wegovy, and Saxenda are all available on the NHS through specialist tier 3 weight management services. Access requires a GP referral and eligibility assessment. You must have a BMI of 30 or above, or BMI 27–29.9 with weight-related health conditions. Waiting lists vary by region. If NHS waiting times concern you, private online prescribers also offer these medications following an online clinical assessment.
How much weight can I expect to lose with prescription weight loss medication?
Clinical trial data shows average weight loss of 15–21% of body weight with Mounjaro and around 15% with Wegovy over several months. However, individual results vary significantly — some people lose more, others less. Weight loss medications work best alongside a reduced-calorie diet and increased physical activity. Results depend on your starting point, adherence, lifestyle changes, and individual metabolism. Your prescriber will discuss realistic expectations for your situation.
How do I know if I'm eligible for prescription weight loss treatment in the UK?
You may be eligible if: you have a BMI of 30 or above, or a BMI of 27–29.9 with at least one weight-related health condition (type 2 diabetes, prediabetes, high blood pressure, sleep apnoea, or cardiovascular disease). For people of South Asian, Chinese, Black African, or Black Caribbean heritage, lower BMI thresholds may apply. Calculate your BMI using our free BMI calculator, then discuss eligibility with your GP or a private prescriber.
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.