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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Weight Loss Supper Ideas: Meals and Medication Options in the UK
Planning healthy suppers is a key part of successful weight loss, but for many UK adults, dietary changes alone aren't always enough. This guide covers practical supper ideas for weight management alongside prescription medication options available through the NHS and private prescribing. We'll explore how evening meals fit into your overall weight loss strategy and when prescription weight loss medication might be appropriate to support your progress.
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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-Licensed Prescription Weight Loss Options
If you're looking to lose weight in the UK, several prescription medications are now available alongside lifestyle changes like healthier suppers. Mounjaro (tirzepatide) is a once-weekly injection licensed for weight management in adults with a BMI of 30 or above, or 27–29.9 with weight-related health conditions. Wegovy (semaglutide) is a GLP-1 receptor agonist also given weekly, with clinical trial data showing average weight loss of approximately 15% body weight. Saxenda (liraglutide) is a daily injection option. All three are prescription-only medicines requiring clinical assessment. Eligibility depends on your BMI, health profile, and individual circumstances. These medications work alongside a reduced-calorie diet and increased physical activity—healthy supper choices are still a crucial part of the weight loss journey. Use our free GLP-1 weight loss calculator to explore potential outcomes with prescription medication, and our BMI calculator to check 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.
NHS vs Private Access and How to Get Started
NHS access to prescription weight loss medication is through specialist tier 3 weight management services. Your GP can refer you if eligible, though availability varies significantly by region and waiting lists can be lengthy. Private access is available through UK-licensed prescribers via online consultations, without NHS referral. A prescriber will assess whether medication is suitable based on your health history, current weight, and BMI. Both routes require a clinical assessment—this is not a decision to make alone. Starting prescription weight loss treatment doesn't replace healthy eating habits; instead, medication like GLP-1 injections typically helps reduce appetite so that preparing and eating smaller, nutritious suppers feels more manageable. Chat with your GP about which route is right for you, and use our free progress tracker to monitor your weight loss over time.
- 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.
Can I lose weight with healthy suppers alone, or do I need medication?
Many people lose weight through diet and exercise changes alone. However, if you have a BMI of 30 or above (or 27+ with health conditions), prescription weight loss medication may be recommended by your GP. Medication works alongside healthy eating—it helps reduce appetite so that managing supper portions feels easier. The right approach depends on your individual health needs.
What makes a good weight loss supper?
A balanced weight loss supper includes lean protein (chicken, fish, tofu), plenty of vegetables for volume and fibre, and a modest portion of complex carbohydrates or healthy fats. Aim for meals around 400–600 kcal depending on your daily target. Eating supper earlier (by 7pm) can also support better sleep and metabolism. Our BMI calculator can help you determine your overall calorie needs.
How do GLP-1 medications like Mounjaro and Wegovy work with meal planning?
GLP-1 injections (including Mounjaro and Wegovy) help regulate appetite hormones, making you feel fuller after smaller meals. This can make it easier to stick to balanced suppers with appropriate portion sizes. You'll still need to plan nutritious meals—medication enhances your efforts rather than replacing them.
How long does it take to see weight loss results with prescription medication?
Clinical trials show that most people notice weight changes within 4–8 weeks, with average weight loss of 15–21% body weight over several months. Results vary between individuals. Medication is typically prescribed for 12 weeks or longer if beneficial. Your prescriber will monitor your progress regularly.
How do I find out if I'm eligible for NHS prescription weight loss medication?
Book an appointment with your GP. They can calculate your BMI, discuss your health history, and refer you to a specialist weight management service if appropriate. Eligibility typically requires a BMI of 30+ or 27+ with weight-related conditions like diabetes or high blood pressure. Private prescribing is also available if you prefer faster access.
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.