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
Which Tea Is Good For Weight Loss?
Several types of tea may support weight loss when combined with a healthy diet and physical activity. Green tea, black tea, and herbal teas like oolong contain compounds that evidence suggests may slightly boost metabolism and support fat burning. However, tea alone is not a weight loss solution — sustainable weight management UK requires a calorie deficit alongside lifestyle changes. For significant weight loss, many people also explore prescription options under medical 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.
Evidence-Based Teas for Weight Loss
Green tea contains catechins and caffeine, which clinical studies suggest may increase fat oxidation by 8-16% during moderate exercise. A typical cup provides around 25-50 mg of caffeine and 25-100 mg of catechins. Drinking 2-3 cups daily may contribute modest weight loss over time when paired with reduced calorie intake.
Black tea contains theaflavins that may support metabolic health and improve cholesterol profiles. Studies show similar fat-burning benefits to green tea, though less extensively researched. Regular consumption alongside weight management activities may provide additional health benefits.
Oolong tea sits between green and black tea in oxidation and may boost metabolism by 3-8%. Some evidence suggests it may specifically support fat loss whilst preserving muscle mass, making it valuable during weight loss phases.
Herbal options like peppermint, ginger, and hibiscus may support digestion and reduce bloating, though they contain no caffeine. These are useful for overall wellness alongside other weight loss UK approaches.
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.
Tea Limitations and Evidence Context
Tea's weight loss effect is modest — studies typically show 1-3 kg loss over 12 weeks when combined with diet and exercise. Tea alone will not produce significant weight loss without a calorie deficit. Calculate your personal BMI using our free BMI calculator above to understand your current weight status and realistic targets.
For more substantial results, many UK adults explore prescription weight loss medication under NHS or private healthcare. These evidence-based options, prescribed following clinical assessment, typically produce larger results when combined with lifestyle changes. Your GP can discuss which approach suits your individual health needs, goals, and medical history.
- 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 really help you lose weight?
Green tea contains catechins that evidence suggests may slightly increase fat burning — studies show 8-16% higher fat oxidation during exercise. However, the effect is modest and works best alongside a calorie deficit and regular physical activity. Drinking 2-3 cups daily may contribute to gradual weight loss over weeks or months, but tea alone is not a weight loss solution.
How much tea should I drink daily for weight loss?
Most evidence supports 2-3 cups of green or black tea daily. Each cup provides beneficial compounds without excessive caffeine. Drinking more than 5 cups daily offers no additional benefit and may cause side effects like sleep disruption. Consistency over weeks matters more than occasional heavy consumption.
Which tea has the most caffeine for weight loss?
Black tea and coffee contain the most caffeine (40-70 mg per cup), followed by green tea (25-50 mg) and oolong (30-50 mg). Caffeine slightly boosts metabolism, but the effect is small — around 3-11% increase. The catechins in green and oolong tea may offer additional fat-burning benefits beyond caffeine alone.
Can tea replace prescription weight loss medication?
No. Tea supports overall wellness but produces minimal weight loss compared to prescription options. For bmi weight loss requiring significant reduction, your GP may recommend prescription medication like GLP-1 injections or other licensed treatments. These require clinical assessment and are far more effective — try our GLP-1 weight loss calculator to estimate potential outcomes.
Is herbal tea good for weight loss?
Herbal teas like peppermint and ginger support digestion and may reduce bloating, which can help you feel lighter. However, they contain no metabolism-boosting compounds like caffeine or catechins. They're valuable for overall wellness and hydration alongside other weight management strategies, but should not be relied on as primary weight loss tools.
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.