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
Apple Cider Vinegar With Mother and Weight Loss in the UK
Apple cider vinegar with mother has become a popular weight loss trend, but the scientific evidence for its effectiveness remains limited. Whilst some studies suggest modest benefits, the research is not conclusive enough to recommend it as a primary weight loss strategy. For UK adults looking to manage their weight, there are evidence-based prescription options and lifestyle approaches that have stronger clinical support and proven results.
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.
Evidence-Based Weight Management Options in the UK
If you're interested in weight management in the UK, several evidence-backed approaches are available. For eligible adults, GLP-1 weight loss medications like Mounjaro (tirzepatide) and Wegovy (semaglutide) have demonstrated significant results in clinical trials. Mounjaro helped participants lose an average of 15–21% of their body weight, whilst Wegovy achieved approximately 15% average weight loss — both alongside reduced-calorie diet and increased physical activity.
You may be eligible for prescription weight loss medication in the UK if you have a BMI of 30 or above, or 27 or above with weight-related health conditions like type 2 diabetes or high blood pressure. A licensed prescriber will assess whether medication is suitable for you based on your individual health profile.
Use our free GLP-1 weight loss calculator to explore potential outcomes at different doses, and our BMI calculator to understand your starting point.
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.
Accessing NHS Weight Loss Support and Private Options
NHS weight loss support is available through tier 3 specialist weight management services, though waiting times and availability vary significantly by region. Many areas have lengthy waiting lists. Alternatively, weight loss injections in the UK are available privately through GPhC-registered online pharmacies following a clinical assessment with a UK-licensed prescriber.
To find out if you're eligible, start by discussing your weight with your GP, who can refer you to specialist NHS services or advise on private options. Track your progress alongside any weight management plan using our free progress tracker. Remember, sustainable weight loss typically occurs at 0.5–1 kg per week and works best when combined with dietary changes and physical activity.
- 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 actually help with weight loss?
Limited research suggests apple cider vinegar may have modest effects on appetite and blood sugar, but evidence is not strong enough to recommend it as a primary weight loss tool. Most weight loss from vinegar consumption comes from the calorie deficit it creates, not the vinegar itself. For stronger evidence-based results, prescription medications or structured lifestyle changes are more effective.
What weight loss medication is available on the NHS in the UK?
GLP-1 medications like semaglutide (Wegovy) and tirzepatide (Mounjaro) are available through NHS specialist weight management services for eligible adults. Saxenda (liraglutide) is also NHS-approved. Access requires referral to a tier 3 or tier 4 weight management service, typically through your GP. Availability and waiting times vary by region.
Can I get weight loss medication privately in the UK?
Yes. Prescription weight loss medications are available through private online clinics run by UK-licensed prescribers. After a clinical assessment, a prescription is issued and dispensed by a GPhC-registered pharmacy. Costs typically range from £129–£320 per month depending on the medication and dose.
Who is eligible for weight loss medication in the UK?
Adults with a BMI of 30 or above, or 27 or above with weight-related health conditions (type 2 diabetes, high blood pressure, sleep apnoea, cardiovascular disease), may be eligible. Lower BMI thresholds apply for South Asian, Chinese, Black African, and Black Caribbean adults. A prescriber will assess your individual eligibility.
How much weight can you lose with GLP-1 medication?
Clinical trials show average weight loss of 15–21% of body weight with Mounjaro and approximately 15% with Wegovy over 12–18 months, alongside diet and exercise. Individual results vary significantly — some people lose more, others less. Weight loss depends on dose, adherence, lifestyle changes, and personal factors. A prescriber can discuss realistic expectations for you.
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.