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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Apple Cider Vinegar With Mother for Weight Loss: What the Evidence Shows
Apple cider vinegar with mother is a popular natural supplement claimed to support weight loss, but the scientific evidence is limited. While some small studies suggest modest benefits, there is no strong clinical evidence that it produces meaningful weight loss on its own. For adults in the UK looking for evidence-based weight management support, NHS weight loss programmes and prescription weight loss medication are available. If you're considering any supplement or weight management approach, it's worth discussing your options with your GP, especially if you have existing health conditions or take medications. Using our free BMI calculator above can help you understand your current weight status and what healthy targets might look like for you.
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.
Prescription Weight Loss Options Available in the UK
If you're looking for evidence-based approaches to weight management in the UK, prescription medications are available for eligible adults. Three main options are licensed for weight management: Mounjaro (tirzepatide), a once-weekly dual GIP and GLP-1 receptor agonist injection; Wegovy (semaglutide), a once-weekly GLP-1 injection; and Saxenda (liraglutide), a daily injection. Clinical trials show these GLP-1 weight loss medications can help people lose an average of 15–21% of their body weight when combined with lifestyle changes, though individual results vary significantly.
- Adults with a BMI of 30 or above are generally eligible
- Those with a BMI of 27–29.9 and weight-related health conditions (type 2 diabetes, high blood pressure, sleep apnoea) may also qualify
- Prescription weight loss medication is available through NHS specialist services or via private prescription
- All options require a clinical assessment before being prescribed
Our GLP-1 weight loss calculator can help you estimate potential weight loss at different medication doses, giving you a realistic picture of what prescription options might achieve.
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.
NHS vs Private Access: How to Find Out What's Right for You
In the UK, prescription weight management is typically accessed through two routes. NHS route: Your GP can refer you to a tier 3 specialist weight management service, where clinicians will assess your eligibility and prescribe medication if appropriate. However, NHS waiting lists vary widely by region and can be substantial in many areas. Private route: You can have an online consultation with a UK-licensed prescriber, who will assess your suitability and issue a prescription if appropriate, dispensed by a GPhC-registered pharmacy.
If you'd like to explore your options, start by talking to your GP about your weight management goals. They can advise on NHS services in your area or discuss whether prescription weight loss might be suitable for you. Using our BMI calculator and weight converter can help you gather the information you need before that conversation.
- 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 apple cider vinegar with mother actually help with weight loss?
Scientific evidence is limited. A few small studies suggest modest effects on blood sugar control, which might indirectly support weight management, but there is no strong clinical evidence that apple cider vinegar produces meaningful weight loss on its own. It should not be relied upon as a weight loss strategy.
What are the most effective weight loss options available in the UK?
Evidence-based options include lifestyle changes (reduced-calorie diet and physical activity), NHS weight management programmes, and for eligible adults, prescription weight loss medications like Mounjaro, Wegovy, or Saxenda. Clinical trials show these GLP-1 medications can achieve 15–21% average weight loss when combined with lifestyle changes.
Am I eligible for prescription weight loss medication on the NHS?
Generally, you may be eligible if you have a BMI of 30 or above, or 25–29 with weight-related health conditions such as type 2 diabetes, high blood pressure, or sleep apnoea. Eligibility criteria vary by region. Ask your GP to refer you to a specialist weight management service for assessment.
How quickly can I expect weight loss results with prescription weight loss medication?
Clinical trials show weight loss typically begins within the first 4–8 weeks and continues gradually over several months. Average weight loss reaches approximately 15–21% of body weight after 68 weeks with consistent medication use alongside dietary changes and physical activity. Individual results vary.
What's the difference between getting prescription weight loss medication through the NHS or privately?
NHS access is through specialist services (referral from GP) but waiting lists can be lengthy and access varies by region. Private access is faster — you can have an online consultation with a UK prescriber within days — but costs around £129–£320 monthly depending on dose. Both require clinical assessment and prescription.
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.