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
Does Tea Help with Weight Loss?
Tea has long been linked to weight loss, but what does the evidence actually show? While certain teas contain compounds that may support weight management, tea alone won't cause significant weight loss. In the UK, healthy weight management is best approached through a combination of balanced nutrition, physical activity, and lifestyle changes — alongside tools like our free BMI calculator to track your progress. This guide explores what the science says about tea and weight loss, aligned with NHS guidance on sustainable healthy weight UK practices.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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.
What the Science Says About Tea and Weight Loss
Green tea contains catechins and caffeine, compounds that some research suggests may slightly increase fat burning and metabolism. However, studies show the effect is modest — typically contributing to around 1–3 kg of additional weight loss over several months when combined with calorie restriction and exercise. Black tea and herbal teas like oolong also contain beneficial antioxidants, though their direct weight loss impact is limited.
- Caffeine in tea may increase alertness and energy for physical activity
- Tea provides hydration without significant calories (when unsweetened)
- Some teas support digestion and may reduce bloating
- The ritual of drinking tea can support healthy habits
The key point: tea is a supportive tool, not a weight loss solution. Sustainable weight management requires a calorie deficit achieved through diet and exercise — NHS guidance recommends losing 0.5–1 kg per week. Use our weight converter to track your weight in your preferred units (kg, stone, or lbs) as part of your progress monitoring.
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.
Which Teas Are Best for Weight Management?
Green tea (3–5 cups daily) offers the strongest evidence for supporting weight management, particularly when combined with reduced-calorie eating. Oolong tea falls between green and black tea in terms of active compounds. Herbal infusions like peppermint, ginger, and chamomile support digestion and may reduce cravings, though they lack caffeine. Choose unsweetened varieties — added sugar negates any potential benefit. For personalised UK health advice on weight management and nutrition, your GP or a registered dietitian can provide guidance tailored to your individual health. Track your weight management journey using our free progress tracker, and calculate your BMI regularly with our free tool to monitor health improvements beyond the scale.
- 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 I lose weight by drinking tea alone?
No. Tea may support weight loss when combined with a calorie deficit and physical activity, but it cannot cause weight loss on its own. Sustainable weight loss requires reducing calorie intake and increasing activity levels. NHS guidance recommends focusing on balanced nutrition and exercise rather than relying on single foods or drinks.
How much weight can green tea help me lose?
Research suggests green tea combined with diet and exercise may contribute to an additional 1–3 kg of weight loss over several months. However, individual results vary significantly. The majority of weight loss comes from the calorie deficit — tea is a supportive addition, not a primary tool.
Should I drink tea hot or cold for weight loss?
Temperature makes minimal difference to weight loss benefits. Unsweetened tea — whether hot or cold — is equally beneficial. Avoid adding sugar, honey, or high-calorie milk alternatives, as these add calories and reduce any potential metabolic benefit.
Is caffeine in tea safe for weight management?
Yes, caffeine is safe for most adults in moderate amounts (up to 400 mg daily). Caffeine may slightly increase energy expenditure and support exercise performance. However, individual tolerance varies — speak to your GP if you have cardiovascular concerns or sensitivity to caffeine.
What's the best way to use tea as part of weight management?
Drink unsweetened tea (green, black, or herbal) as part of a healthy routine alongside a calorie-controlled diet and regular activity. Use tools like our BMI calculator to track your health progress, and aim for sustainable changes. If weight management is challenging, your GP can discuss options including NHS-supported weight management services available in your area.
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.