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
Weight Loss And Detox Tea — What Science Actually Shows
Detox tea is popular for weight loss, but the evidence is limited. Most "detox" teas don't actively remove toxins from your body — your liver and kidneys already do that job naturally. Some may have mild benefits for weight management as part of a broader healthy lifestyle, but they're not a weight loss solution on their own. For sustainable UK weight loss, evidence-based approaches like calorie reduction, physical activity, and prescription weight loss medication (when appropriate) are far more effective. Let's explore what the science actually says.
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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 Detox Teas Actually Help Weight Loss?
Most commercial detox teas contain ingredients like green tea, ginger, or senna that have some research backing, but the evidence for weight loss is weak. Green tea contains catechins and caffeine, which may increase fat oxidation slightly — studies suggest a modest effect of 1–3 kg loss over several months when combined with a reduced-calorie diet. Senna and other herbal laxatives can cause temporary water weight loss, but this is not real fat loss and returns quickly once you rehydrate.
The fundamental problem: weight loss requires a calorie deficit. No tea, supplement, or herbal drink can replace this basic need. A cup of detox tea contains virtually no calories and won't reduce your appetite significantly. While staying hydrated is important for weight management, plain water works just as well as any branded detox tea — and costs far less.
- Green tea: modest effect on metabolism when combined with diet and exercise
- Senna-based teas: cause temporary water loss, not sustainable fat loss
- Most commercial claims: exaggerated and not supported by strong evidence
- Cost: detox tea programmes can be expensive for minimal benefit
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 Weight Loss Methods For UK Adults
For sustainable weight management UK outcomes, the NHS recommends a structured approach: a calorie deficit of 500 kcal per day (achieved through reduced-calorie diet and increased physical activity) typically results in loss of approximately 0.5–1 kg per week. Evidence shows this is far more effective than any tea or supplement.
For adults with a BMI of 30 or above, or BMI of 27–29.9 with weight-related health conditions, prescription weight loss medication may be appropriate. GLP-1 medications like Wegovy have robust clinical evidence — the STEP-1 trial showed an average loss of approximately 15% body weight over 68 weeks. All prescription weight loss options require a clinical assessment and must be combined with dietary and lifestyle changes.
- Calorie deficit through diet and exercise: proven, sustainable
- GLP-1 weight loss injections: prescription-only, evidence-based option
- Progress tracking: use our free progress tracker to monitor real results
- Professional support: GP or specialist weight management service recommended
- 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.
Does green tea actually burn fat for weight loss?
Green tea contains catechins and caffeine that may slightly increase fat oxidation — research suggests a modest effect of 1–3 kg over several months when combined with a reduced-calorie diet and exercise. However, this effect is small and cannot replace the fundamental calorie deficit needed for weight loss. It's a minor supportive measure, not a primary weight loss strategy.
Are detox teas safe to use regularly?
Most herbal teas are safe for occasional use, but senna and other laxative-based detox teas can cause cramping, diarrhoea, and electrolyte imbalances if used long-term. They're also not recommended during pregnancy or for people with digestive disorders. Always consult your GP before starting any detox tea programme, especially if you take other medications.
What's the difference between detox tea and actual weight loss medication?
Detox teas are unregulated herbal products with minimal evidence for weight loss. Prescription weight loss medications like Wegovy or Mounjaro are clinically tested, regulated by the MHRA, and have strong evidence from large trials. Medications like Wegovy showed 15% average body weight loss in clinical trials. Detox teas have no such evidence and cannot replace medical treatment.
Can I use detox tea alongside prescription weight loss medication?
While a cup of tea is unlikely to cause harm, it won't add benefit. If you're prescribed GLP-1 medication or other weight loss treatment, focus on following your clinical plan — calorie reduction, physical activity, and taking your medication as directed. Check with your prescriber if you're concerned about any herbal products or supplements.
What's the best approach to weight loss in the UK?
For sustainable UK weight loss, start with the NHS approach: create a calorie deficit through a reduced-calorie diet and increased physical activity, aiming for 0.5–1 kg loss per week. Use our free BMI calculator to check your current status and healthy weight range. If you have a BMI of 30 or above (or 27+ with health conditions), discuss prescription weight loss medication with your GP, who can refer you to a specialist weight management 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.