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 Apple Cider Vinegar Help Weight Loss?
Apple cider vinegar is often promoted as a weight loss supplement, but the evidence for its effectiveness is limited. While some small studies suggest it may have modest effects on blood sugar and appetite, most UK health organisations including the NHS do not recommend it as a primary weight management tool. For sustainable weight loss, evidence-based approaches including dietary changes, physical activity, and in some cases prescription weight loss medication, are far more effective. This guide explains what the research shows and explores proven weight management options available in the UK.
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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 Say About Apple Cider Vinegar?
Apple cider vinegar contains acetic acid, which some research suggests may help with blood sugar control and increase feelings of fullness. However, the evidence for weight loss is weak and inconsistent. A small 2018 study found modest weight loss in overweight adults, but results varied significantly between participants, and the effect was minor (around 1–2 kg over 12 weeks) compared to lifestyle changes alone.
The NHS and leading UK health bodies do not recommend apple cider vinegar as a weight loss treatment because:
- Evidence is limited to small, short-term studies
- Results are not statistically significant compared to placebo in most trials
- It cannot replace calorie reduction or exercise
- Regular consumption may damage tooth enamel and interact with certain medications
- It is not a substitute for proven weight management in the UK, which relies on dietary change, activity, and where appropriate, prescription options
For sustainable weight loss, the NHS recommends a calorie deficit of around 500 kcal per day, which typically results in losing 0.5–1 kg per week. Use our free BMI calculator above to check your current health status and understand 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.
Prescription Weight Loss Options Available in the UK
If you are struggling to lose weight through diet and exercise alone, prescription weight loss medication may be an option. In the UK, three GLP-1 receptor agonist medications are licensed for weight management: Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide).
Eligibility depends on your BMI and health profile. Adults with a BMI of 30 or above, or 27 or above with weight-related conditions such as type 2 diabetes or high blood pressure, may be eligible. Access is available through NHS specialist weight management services or private online prescribing. Clinical trials show that GLP-1 weight loss medications can support average weight loss of 15–21% of body weight when combined with lifestyle changes. Try our GLP-1 weight loss calculator to explore potential outcomes at different doses, then speak with your GP about whether prescription medication might be suitable for you.
- 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.
Is apple cider vinegar safe to drink every day?
Regular consumption of apple cider vinegar may erode tooth enamel and cause digestive issues in some people. It can also interact with diabetes medications and diuretics. Always dilute it if you choose to use it, and discuss with your GP if you take regular medications before making it a daily habit.
How much weight can you lose with apple cider vinegar?
Limited research suggests minimal weight loss—typically 1–2 kg over several months if any effect at all. This is far less than lifestyle changes alone (which can achieve 0.5–1 kg per week) or prescription weight management options. Apple cider vinegar should not be relied upon as a weight loss tool.
What is the most effective weight loss method available in the UK?
The most effective approach combines a calorie deficit (typically 500 kcal per day), regular physical activity, and behaviour change support. For eligible adults, NHS weight loss services or prescription weight loss medication (Mounjaro, Wegovy) combined with lifestyle changes shows the strongest evidence for significant, sustained weight loss.
How do I know if I am eligible for prescription weight loss medication in the UK?
You may be eligible if you have a BMI of 30 or above, or 27 or above with a weight-related health condition such as type 2 diabetes or hypertension. Contact your GP for an assessment, or use our BMI calculator above to check your starting point and discuss options with a healthcare professional.
Can I get weight loss injections on the NHS?
Yes, Mounjaro, Wegovy, and Saxenda are available through NHS specialist weight management services, though availability and waiting times vary by region. You can also access them privately through a UK-licensed prescriber following an online clinical assessment. Your GP can advise on NHS options 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.