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 Apple Cider Vinegar Help With Weight Loss?
Apple cider vinegar (ACV) has become popular as a weight loss supplement, but scientific evidence for its effectiveness is limited. While some small studies suggest modest effects on blood sugar and appetite, robust clinical evidence remains weak. If you're interested in weight management in the UK, this guide explores what the research shows about ACV alongside evidence-based alternatives, including prescription weight management options available through the NHS and private providers. Our free BMI calculator can help you assess your current health status and determine whether you might benefit from professional weight management support.
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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 Research Show About ACV and Weight Loss?
Scientific studies on apple cider vinegar and weight loss have produced mixed results. A small 2018 study suggested that acetic acid (the active component in ACV) may have minor effects on appetite suppression and fat metabolism, but the weight loss observed was modest—typically less than 1 kg over several weeks. Most research involved very small sample sizes and short study periods. Current evidence does not support ACV as an effective standalone weight loss treatment. Any weight loss associated with ACV is likely due to increased awareness of diet rather than the vinegar itself. For meaningful weight management in the UK, evidence-based approaches combining dietary changes, increased physical activity, and—where appropriate—prescription medication offer much stronger support. Our GLP-1 weight loss calculator can show you projected weight loss outcomes with clinically-proven prescription options like Mounjaro and Wegovy, which have undergone large-scale trials with significantly better-documented results.
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-Approved Weight Management Options in the UK
If you're seeking evidence-based weight management in the UK, prescription weight loss medications are available for eligible adults. Mounjaro (tirzepatide) and Wegovy (semaglutide) are licensed weight management injections that work through the GLP-1 pathway to help reduce appetite and support sustainable weight loss. Clinical trials show average weight loss of 15–21% of body weight over 72 weeks alongside diet and activity changes. You may be eligible if your BMI is 30 or above, or 27–29.9 with weight-related health conditions like type 2 diabetes or high blood pressure. Access is available through NHS specialist weight management services (tier 3) or private online prescribing following a clinical assessment. Your GP can advise on NHS eligibility and referral, or you can explore private options directly with a UK-licensed prescriber.
- 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 daily for weight loss?
While small daily amounts of diluted ACV are generally considered safe for most people, there is no proven weight loss benefit that justifies regular consumption. Undiluted ACV can damage tooth enamel and cause digestive issues. If you choose to use ACV, dilute it in water and consult your GP first, especially if you take diabetes medications or have digestive conditions.
How does ACV compare to prescription weight loss medications available in the UK?
ACV has minimal clinical evidence for weight loss, whereas prescription medications like Mounjaro and Wegovy have undergone large clinical trials showing average weight loss of 15–21% of body weight. Prescription options work through proven biological mechanisms (GLP-1 receptor activation) and are monitored by healthcare professionals. They are far more effective than supplements or foods, though they do require a prescription and clinical assessment.
What is the most effective way to lose weight according to NHS guidance?
The NHS recommends a sustainable approach combining reduced-calorie diet, increased physical activity, and behavioural support. For adults with obesity or overweight with health conditions, prescription weight loss injections (GLP-1 medications) are now available through NHS specialist services. Use our free BMI calculator to check your starting point, then speak with your GP about NHS or private options.
Can I get prescription weight loss medication on the NHS in the UK?
Yes. Mounjaro and Wegovy are now available through NHS specialist tier 3 weight management services for eligible adults. Eligibility typically requires a BMI of 30 or above, or 27–29.9 with weight-related health conditions. Access varies by region and availability. Ask your GP for a referral to your local specialist weight management service, or explore private options if NHS waiting lists are lengthy.
How quickly will I lose weight with prescription weight loss injections?
Clinical trials show average weight loss of 0.5–1 kg per week with prescription GLP-1 medications when combined with diet and activity changes, though individual results vary significantly. Maximum weight loss typically occurs by week 68–72 of treatment. Our GLP-1 weight loss calculator can help you estimate potential outcomes at different doses, and your prescriber will monitor your progress throughout treatment.
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.