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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Does Detox and Weight Loss Tea Actually Work?
Detox and weight loss teas are popular in the UK, but evidence for their effectiveness is limited. While some herbal teas may offer modest health benefits, they're not a reliable weight loss solution on their own. Real, sustainable weight management requires a reduced-calorie diet, increased physical activity, and sometimes prescription medication alongside lifestyle changes. This guide explains what the evidence actually shows about weight loss teas and how they compare to proven weight loss approaches recommended by the NHS.
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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 the Evidence Says About Weight Loss Tea
Most commercial "detox" and "weight loss" teas lack strong scientific evidence supporting significant weight loss claims. Some herbal ingredients like green tea contain catechins and caffeine, which may modestly boost metabolism, but the effect is minimal—typically contributing to weight loss of less than 1 kg over several weeks. The problem is that tea alone doesn't create the calorie deficit needed for meaningful weight loss.
- Green tea may provide small metabolic benefits (approximately 50–100 extra calories burned daily at best)
- Caffeine can increase alertness and may slightly suppress appetite temporarily
- Herbal teas like peppermint or ginger may reduce bloating or aid digestion, but do not burn fat
- "Detox" claims are often unsubstantiated—your liver and kidneys already detoxify your body naturally
- Weight loss teas are not regulated as strictly as medications, so quality and potency vary widely
For sustainable weight management in the UK, the NHS recommends lifestyle changes first, with prescription medication available through specialist services if needed.
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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 Really Works vs. Weight Loss Teas
Sustainable weight loss requires a calorie deficit—typically around 500 calories per day to lose approximately 0.5 kg per week, according to NHS guidance. This comes from eating less, moving more, or a combination of both. Weight loss teas can support this by encouraging hydration and potentially providing minor metabolic boosts, but they cannot replace the fundamental requirement of eating fewer calories than you burn.
If you're struggling with weight loss through diet and exercise alone, your GP can refer you to specialist weight management services or discuss prescription options. Our free BMI calculator can help you understand your current weight status, and our GLP-1 weight loss calculator can show you what evidence-based medication approaches may help if you're eligible.
- 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.
Can detox tea help me lose weight?
Detox tea alone is unlikely to produce meaningful weight loss. While some herbal teas may offer minor health benefits, weight loss requires a sustained calorie deficit through diet and activity. Tea can support hydration and may help you feel fuller, but it's not a weight loss solution on its own.
Is detox tea safe to drink daily?
Most herbal teas are safe in moderation, but some ingredients can interact with medications or cause side effects. Excessive caffeine intake can cause anxiety or sleep disruption. Always check ingredient lists and speak to your GP if you take medications or have health conditions before consuming detox teas regularly.
What actually works for weight loss in the UK?
The NHS recommends a reduced-calorie diet combined with increased physical activity as the foundation. If lifestyle changes aren't enough, your GP can refer you to tier 3 specialist weight management services, where prescription medication like GLP-1 injections may be considered alongside continued lifestyle support.
Does green tea burn belly fat?
Green tea contains compounds that may slightly increase calorie burn, but it does not specifically target belly fat. Weight loss from any method affects the whole body. Consistent calorie deficit, regular exercise, and sometimes medication are more effective than tea for sustainable weight loss.
Should I drink weight loss tea instead of seeing my GP?
No. If you're concerned about your weight or struggling to lose weight, speak to your GP. They can assess your health, rule out underlying conditions, and refer you to appropriate support services. Weight loss teas should never replace professional medical advice or evidence-based weight management approaches.
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.