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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Healthy Dinner Meals for Weight Loss in the UK
Eating healthy dinners is one of the most effective ways to support weight loss, but it works best alongside other strategies. In the UK, weight management can be approached through dietary changes, lifestyle adjustments, and prescription medication if you're eligible. This guide explores how to build nutritious evening meals, understand your BMI, and discover what weight loss options may be available to you 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.
Prescription Weight Loss Options Available in the UK
If you're managing your weight in the UK, several prescription weight loss medications are now available for eligible adults. The main options include Mounjaro (tirzepatide), a dual GIP and GLP-1 receptor agonist, and Wegovy (semaglutide), a GLP-1 agonist. Both are once-weekly injections that may help reduce appetite and support feeling fuller after smaller meals.
- Eligibility: Adults with a BMI of 30 or above, or BMI of 27–29.9 with weight-related health conditions (such as type 2 diabetes, high blood pressure, or sleep apnoea)
- How they work: Clinical trials showed Mounjaro helped participants lose an average of 15–21% of body weight, while Wegovy supported approximately 15% average weight loss — though individual results vary significantly
- Alongside lifestyle: These medications work best when combined with reduced-calorie meals (like the healthy dinners discussed below) and increased physical activity
- Saxenda (liraglutide): A daily injection option also licensed in the UK for weight management
All prescription weight loss medications require a clinical assessment before being prescribed and are available through NHS specialist weight management services or private online prescribing.
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.
Getting Started: NHS vs Private Access in the UK
NHS route: Weight loss medication is available through tier 3 specialist weight management services. You'll need a referral from your GP, and availability varies by region — waiting times can be several months in many areas. Your GP can discuss whether referral to specialist services is appropriate for you and explore what dietary and lifestyle support is available locally.
Private route: Prescription weight loss medication is also available through GPhC-registered online pharmacies following a clinical assessment with a UK-licensed prescriber. This allows access without NHS waiting lists, though costs apply. Whichever route you explore, combining prescription support with healthy dinners, regular movement, and tracking your progress gives the best results. Use our free GLP-1 weight loss calculator to estimate potential outcomes, and our BMI calculator to understand your starting point.
- 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.
What makes a healthy dinner meal for weight loss?
A balanced weight loss dinner includes lean protein (chicken, fish, tofu), plenty of vegetables (at least half your plate), and controlled portions of wholegrains or starchy vegetables. Aim for approximately 400–500 kcal per meal, rich in fibre to help you feel full longer.
Can prescription weight loss medication replace healthy eating?
No. Weight loss medications like Mounjaro and Wegovy are designed to work alongside reduced-calorie meals and increased physical activity, not replace them. Healthy dinners remain essential for sustainable weight management and overall health.
How do I find out if I'm eligible for prescription weight loss treatment in the UK?
Contact your GP and discuss your weight management goals. They can assess your BMI, check for weight-related health conditions, and either provide support directly or refer you to specialist weight management services where prescription medication may be considered.
What's the difference between NHS and private weight loss medication access?
NHS access is through specialist tier 3 services (referral required, regional variation, potential waiting lists). Private access is through online prescribers (faster, costs apply, no NHS referral needed). Both require clinical assessment; choose based on your circumstances and timeline.
How quickly can I expect weight loss with prescription medication?
In clinical trials, participants on Mounjaro or Wegovy typically saw noticeable weight loss after 8–12 weeks, with continued loss over several months. Results vary between individuals. Combined with healthy dinners and activity, outcomes are generally better than medication alone.
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.