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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Best Teas for Weight Loss in the UK
Many people wonder if certain teas can help with weight loss, and whilst some varieties contain compounds that may support metabolism, tea alone is rarely sufficient for meaningful weight management. The good news is that if you're looking to lose weight, the UK now offers prescription weight loss medications such as Mounjaro and Wegovy alongside lifestyle changes like diet and exercise. This guide explores what the science says about weight loss teas, and introduces you to prescription options available through NHS or private services if you're eligible.
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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 Science Says About Weight Loss Teas
Green tea contains catechins and caffeine, compounds that some studies suggest may support modest increases in calorie burn and fat oxidation. However, any benefit is small—typically contributing to weight loss only when combined with a calorie-controlled diet and physical activity. Black tea, oolong tea, and herbal teas like peppermint may also play a supportive role in weight management by promoting satiety or boosting metabolism slightly.
The reality is that no tea will produce significant weight loss on its own. A cup of green tea contains roughly 25–50mg of caffeine and minimal calories, so its impact depends entirely on your overall lifestyle. If you're looking for more substantial support with weight management in the UK, prescription options are worth discussing with your GP, especially if you have a BMI of 30 or above, or 27 or above with weight-related health conditions.
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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.
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Prescription Weight Loss Options Available in the UK
For adults seeking more effective weight management support, Mounjaro (tirzepatide) and Wegovy (semaglutide) are prescription-only GLP-1 medications licensed in the UK. Both work by supporting appetite regulation and can help achieve meaningful weight loss when combined with dietary changes and increased physical activity. Clinical trials showed participants on these medications lost an average of 15–21% of body weight—significantly more than tea alone could achieve.
Access is available through NHS specialist weight management services (via GP referral) or through private online prescribing following a clinical assessment. Eligibility depends on your BMI and health profile. Try our free GLP-1 weight loss calculator to estimate potential outcomes, and use our BMI calculator to check where you currently fall on NHS guidelines.
- 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 green tea really help you lose weight?
Green tea contains catechins and caffeine which may support a small increase in calorie burn, but the effect is modest. Research suggests it works best alongside a reduced-calorie diet and exercise. On its own, green tea won't produce significant weight loss. For more substantial support, prescription weight loss medications are available in the UK.
Which teas are best for weight loss?
Green tea, oolong tea, and black tea all contain compounds that may modestly support metabolism. Peppermint tea may help with digestion and appetite control. However, none of these teas alone will produce meaningful weight loss. Combining tea with a healthy diet, exercise, and potentially prescription medication (if eligible) is more effective.
How do I know if I'm eligible for prescription weight loss medication in the UK?
You may be eligible if you have a BMI of 30 or above, or 27 or above with weight-related health conditions like type 2 diabetes, high blood pressure, or sleep apnoea. Use our free BMI calculator to check your current BMI, then speak to your GP about eligibility for prescription options like Mounjaro or Wegovy.
What's the difference between NHS and private weight loss medication in the UK?
NHS access is through specialist tier 3 weight management services via GP referral—availability and waiting times vary by region. Private prescribing is available through online consultations with UK-licensed prescribers, often faster but at a cost. Both require a clinical assessment to confirm suitability.
Can I use tea alongside prescription weight loss medication?
Yes, tea can be part of a healthy lifestyle alongside prescription medication. Medications like Mounjaro and Wegovy work best when combined with reduced-calorie diet and increased physical activity. Green tea and other herbal teas contain minimal calories and may contribute to overall wellness, but they're not a substitute for the medication itself. ```
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.