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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Does Kombucha Help With Weight Loss?
Kombucha is often marketed as a weight loss aid, but the evidence for its effectiveness is limited. While kombucha may offer some minor health benefits, it's not a proven weight loss solution on its own. If you're looking to lose weight in the UK, understanding what actually works—alongside checking your BMI and setting realistic goals—is far more important than relying on trendy beverages. This guide explains what kombucha is, what research says, and the weight management strategies that evidence actually supports.
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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.
What Does the Evidence Show About Kombucha?
Kombucha is a fermented tea drink containing live bacteria and yeast. It's often promoted as having weight loss, digestive, and detoxification benefits. However, scientific evidence for these claims is weak. Most studies on kombucha are very small or conducted in test tubes rather than on real people.
Key points from research:
- No large-scale human trials have proven kombucha causes weight loss
- Kombucha typically contains 2–8g of sugar per 100ml—similar to some soft drinks
- The probiotic content varies widely between brands and batches
- Some kombucha varieties contain caffeine, which may have a tiny appetite-suppressing effect, but this is minimal
- Any potential gut health benefit is not directly linked to weight loss
In short, kombucha is not a weight loss medication or tool. If you want to check your current weight and BMI in the context of UK health guidelines, use our free BMI calculator above to get a clear picture of your starting point.
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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.
What Actually Works for Weight Loss in the UK?
Evidence-based weight loss strategies include calorie deficit, increased physical activity, and behavioural support. The NHS recommends losing weight at a rate of 0.5–1 kg per week for sustainable results. For eligible adults, prescription weight loss medications—such as GLP-1 weight loss injections—may be recommended by a GP or NHS specialist weight management service.
These approaches are far more effective than relying on kombucha alone. If you're exploring weight management options, our GLP-1 weight loss calculator can help you understand potential outcomes with evidence-based treatment. Your GP can discuss whether prescription weight loss medication is suitable for you based on your individual health, BMI, and any weight-related health conditions you may have. Tracking your progress with our free progress tracker can also help you stay motivated and accountable.
- 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 kombucha have any real health benefits?
Kombucha contains probiotics and antioxidants, which may support gut health and general wellbeing in some people. However, the evidence is limited, and benefits are modest. Regular kombucha consumption is not a substitute for a balanced diet or medical treatment. If you have digestive issues, always discuss this with your GP.
Can kombucha replace weight loss injections or medication?
No. Kombucha is a fermented beverage with no proven weight loss effect. Prescription weight loss medications like GLP-1 injections (Mounjaro or Wegovy) are clinically tested, prescription-only treatments that work through specific hormonal mechanisms. Kombucha cannot replace these. Your GP can assess whether you're eligible for prescription weight loss support.
How much sugar does kombucha contain?
Most commercial kombucha contains 2–8g of sugar per 100ml, depending on the brand and flavour. Some varieties can be higher. This is comparable to soft drinks and should be factored into your daily sugar intake if you're managing weight. Always check the label before purchasing.
Is kombucha safe to drink daily?
For most people, moderate kombucha consumption is safe. However, it contains trace amounts of alcohol (typically under 0.5%) and caffeine. If you're pregnant, breastfeeding, or have a weakened immune system, speak to your GP before drinking kombucha regularly.
What's the best way to lose weight if kombucha won't help?
Evidence-based approaches include creating a calorie deficit through balanced eating, increasing physical activity, and seeking professional support through your GP or NHS weight management services. For qualifying adults, prescription weight loss treatment may be recommended. Our free BMI calculator and progress tracker can help you monitor your journey.
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.