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
Can Tea Help You Lose Weight?
Tea can support weight management as part of a balanced approach, though it's not a substitute for dietary changes and physical activity. Some teas contain compounds that may boost metabolism or support appetite control, but results are modest. This guide explains what the evidence shows about different types of tea, how they work, and where they fit into a broader weight management strategy aligned with NHS guidance.
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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.
Which Teas May Support Weight Loss?
Green tea is the most researched for weight management. It contains catechins and caffeine, which may slightly increase fat oxidation and metabolic rate. Studies suggest a modest benefit — typically around 1–3 kg over several months when combined with calorie reduction. Black tea and oolong tea may offer similar benefits due to their caffeine and polyphenol content. Herbal teas like peppermint or ginger may support digestion and reduce bloating, though they don't directly burn fat. The key point: tea works alongside weight management UK approaches, not instead of them. Drinking 2–3 cups daily of green or oolong tea, as part of a reduced-calorie diet and increased physical activity, may support modest weight loss — but individual results vary significantly.
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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 Do Tea Compounds Work?
Tea contains caffeine, which can temporarily increase alertness and energy expenditure. Catechins (found especially in green tea) may promote fat breakdown and improve fat oxidation during exercise. Polyphenols in black and oolong tea have antioxidant properties and may support metabolic function. However, these effects are modest — typically adding only 50–100 extra calories burned per day at most. Tea is best viewed as a supportive beverage within a broader weight loss plan, not a standalone solution. For sustainable weight management NHS guidelines recommend combining dietary changes, physical activity, and behavioural support — not relying on any single food or drink.
- 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 tea really help you lose weight?
Tea may support modest weight loss when combined with a reduced-calorie diet and physical activity, but the effect is small. Green tea research shows approximately 1–3 kg loss over several months. Tea works best as part of a comprehensive approach, not as a standalone weight loss solution. Individual results vary.
How much tea should I drink for weight loss?
Research suggests 2–3 cups daily of green or oolong tea may offer benefits. Ensure you're not adding sugar or high-calorie milk. Remember that weight management UK requires overall calorie balance — tea alone won't create the deficit needed for weight loss.
Is green tea better than black tea for weight loss?
Green tea has slightly more research supporting weight management benefits due to its catechin content, but black tea and oolong tea offer similar modest effects. Both contain caffeine and polyphenols. Choose the tea you enjoy — consistency matters more than the specific type.
Can tea replace prescription weight loss medication?
No. Tea offers only modest support for weight management. If you have a BMI of 30 or above, or 27 or above with weight-related health conditions, your GP can discuss prescription options like GLP-1 weight loss medications, which offer clinically significant results alongside lifestyle changes.
What about herbal teas for weight loss?
Herbal teas like peppermint or ginger may support digestion and reduce bloating, making you feel more comfortable, but they don't directly promote fat loss. They're a pleasant addition to a weight management plan but shouldn't replace evidence-based approaches like calorie reduction and physical activity.
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.