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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Free Meal Plans and Weight Loss Medication in the UK
If you're looking for free meal plans to support weight loss in the UK, you'll find many resources available through the NHS and other organisations. However, for adults struggling with weight management despite diet and exercise changes, prescription weight loss medication may also be an option. This guide explains the free meal planning resources available, plus how to find out if you're eligible for prescription weight management options like Mounjaro or Wegovy through the NHS or private prescribing.
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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.
UK Weight Loss Medication Options for Eligible Adults
If you have a BMI of 30 or above (or 27 and above with weight-related health conditions like type 2 diabetes or high blood pressure), you may be eligible for prescription weight loss medication in the UK. Three GLP-1 and GIP receptor agonist medications are licensed for weight management:
- Mounjaro (tirzepatide) — a dual GIP and GLP-1 injection, once weekly. Clinical trials showed an average weight loss of 15–21% of body weight alongside reduced-calorie diet and exercise.
- Wegovy (semaglutide) — a GLP-1 injection, once weekly. Average weight loss in trials was approximately 15% of body weight.
- Saxenda (liraglutide) — a GLP-1 injection, once daily. Used for sustained weight management.
These are prescription-only medicines. A licensed prescriber will assess whether medication is appropriate for you based on your individual health. Individual results vary — medication works best alongside dietary changes and increased physical activity, not as a replacement for them.
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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 Weight Loss Support: NHS vs Private Routes
Through the NHS: You can speak to your GP about weight management support. The NHS offers free resources including the NHS Weight Loss Plan, digital weight loss apps, and referral to specialist tier 3 weight management services where medication may be considered. NHS availability varies significantly by region and waiting times can be lengthy.
Privately: You can access a prescription from a UK-licensed prescriber via online consultation, with medication dispensed by a GPhC-registered pharmacy. This route doesn't require NHS referral. Costs vary by dose and provider, typically ranging from £129–£320 monthly. Your GP can always advise on whether prescription medication is right for you, regardless of whether you pursue NHS or private access.
- 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.
Are free meal plans enough for weight loss?
Free meal plans can be very helpful as part of a weight loss approach — they support healthy eating habits and calorie awareness. However, success depends on consistency, individual metabolism, and lifestyle factors. If you've tried structured meal plans without sufficient results, your GP may discuss additional options like prescription weight loss medication.
How do I know if I'm eligible for weight loss medication on the NHS?
You may be eligible if you have a BMI of 30 or above, or 25–29.9 with weight-related health conditions. The best first step is to speak with your GP, who can assess your individual circumstances, discuss weight management options, and refer you to specialist services if appropriate. You can also use our free BMI calculator to check your current BMI.
What's the difference between Mounjaro and Wegovy?
Both are once-weekly injections for weight management. Mounjaro (tirzepatide) is a dual GIP and GLP-1 agonist with an average weight loss of 15–21% in trials. Wegovy (semaglutide) is a GLP-1 agonist with average weight loss around 15%. A prescriber will recommend which is more suitable based on your health profile. Results vary between individuals.
Can I use free meal plans alongside prescription weight loss medication?
Yes — in fact, prescription weight loss medication works most effectively alongside a reduced-calorie diet and increased physical activity. Free NHS meal planning resources and commercial diet plans can complement medication well. Our GLP-1 weight loss calculator can help estimate potential results when combining dietary changes with medication.
How do I start the conversation with my GP about weight loss options?
Simply book a routine appointment and explain that you're interested in exploring weight management support. Mention your BMI, any weight-related health conditions, and what you've already tried. Your GP can discuss the full range of options — from lifestyle support through to specialist services and potential medication — based on your individual needs.
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.