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
Pink Salt Weight Loss Reviews — What the Evidence Says
Pink salt is often promoted for weight loss online, but there's limited scientific evidence supporting these claims. If you're looking for effective, evidence-based weight loss support in the UK, prescription weight management options like Mounjaro and Wegovy are available for eligible adults. These GLP-1 medications have strong clinical evidence and work alongside lifestyle changes. This guide explains what's actually available on the NHS and privately, and how to find out if you're eligible for prescription weight loss treatment.
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.
UK-Licensed Prescription Weight Loss Options
If you're interested in effective weight loss medication in the UK, three prescription-only options are currently licensed: Mounjaro (tirzepatide), Wegovy (semaglutide), and Saxenda (liraglutide). These are not supplements—they're prescription medications that work by activating natural hormone pathways that regulate appetite and fullness.
Mounjaro is a dual GIP and GLP-1 receptor agonist that may help reduce food cravings and support feeling fuller after smaller meals. Clinical trials showed users lost an average of 15–21% of their body weight alongside reduced-calorie diet and increased physical activity.
Wegovy is a GLP-1 receptor agonist given as a once-weekly injection. Clinical trials demonstrated average weight loss of around 15% body weight over 68 weeks.
Eligibility typically requires a BMI of 30 or above, or 27 or above with weight-related health conditions like type 2 diabetes, high blood pressure, or cardiovascular disease. Use our free BMI calculator above to check your personal BMI and see where you fall on the NHS guidelines.
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 Get Started
NHS access: Prescription weight loss medications are available through specialist tier 3 weight management services, not standard GP prescriptions. You'll need a GP referral to your local specialist service. Waiting lists vary significantly by region—some areas have delays of several months. Your GP can discuss whether you're eligible and arrange a referral.
Private access: Available through GPhC-registered online pharmacies following a clinical assessment with a UK-licensed prescriber. You can access treatment without NHS referral. Have a conversation with your GP first about whether prescription weight loss treatment is right for you—they know your full health picture and can advise on suitability.
- 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 pink salt actually effective for weight loss?
There's no robust clinical evidence that pink salt promotes weight loss. While pink salt contains trace minerals, these don't significantly impact weight management. Evidence-based approaches—calorie deficit, increased physical activity, and where appropriate, prescription medication—remain the most effective options for sustainable weight loss.
What's the difference between Mounjaro and Wegovy?
Mounjaro (tirzepatide) activates two hormone pathways (GIP and GLP-1), while Wegovy (semaglutide) activates one (GLP-1 only). Both are once-weekly injections. Clinical trial data suggests slightly higher average weight loss with Mounjaro, but individual results vary. Your prescriber will assess which is more suitable for you.
How do I know if I'm 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 weight-related health conditions. Calculate your BMI using our free BMI calculator on this page. Contact your GP to discuss whether you might be a candidate for specialist referral or private assessment.
Can I get Mounjaro or Wegovy on the NHS?
Yes, both are available through NHS specialist weight management services, but you'll need a GP referral. NHS availability varies by region and waiting lists can be lengthy. Private access is also available through online prescribers without NHS referral. Ask your GP about your local options.
How quickly will I lose weight on these medications?
Results vary significantly between individuals. Clinical trials showed average weight loss of 15–21% over several months, but this depends on the dose, how your body responds, adherence to the medication, and lifestyle changes. Weight loss is not assured. Track your progress using our free progress tracker alongside any prescription 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.