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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Mediterranean Diet For Weight Loss — Evidence-Based Guide
The Mediterranean diet is one of the most evidence-backed approaches to weight management in the UK. Unlike restrictive fad diets, it focuses on whole foods including olive oil, fish, vegetables, and legumes — making it sustainable long-term. The NHS recognises the Mediterranean pattern as supporting both weight loss and cardiovascular health. While weight loss ultimately depends on creating a calorie deficit, the Mediterranean diet's nutrient density and satiety help many people naturally reduce intake without extreme restriction. This guide explains how it works, realistic expectations, and how it fits alongside other weight management strategies.
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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.
How The Mediterranean Diet Supports Weight Loss
The Mediterranean diet achieves weight loss through several mechanisms aligned with how our bodies naturally regulate appetite. Fibre from vegetables, whole grains, and legumes increases satiety, helping you feel fuller longer and naturally eat less. Healthy fats from olive oil and fish — particularly omega-3 fatty acids — support hormonal balance and reduce inflammation. The diet's emphasis on protein (fish, legumes, Greek yoghurt) preserves muscle mass during weight loss, which is crucial for metabolism. Unlike low-fat diets that often leave people hungry, the Mediterranean approach uses satisfying whole foods, making it easier to maintain a calorie deficit without willpower alone.
Research shows that Mediterranean-style eating produces sustainable weight loss of approximately 0.5–1 kg per week when combined with modest calorie awareness — aligning with NHS weight loss guidelines. The diet's focus on minimally processed foods naturally reduces excess calories from added sugars and ultra-processed items. Many people following this pattern also report improved energy, better digestion, and reduced cravings. Use our free weight loss calculator to project potential results with different dietary approaches, and track your progress with our progress tracker to monitor what works for your body.
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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.
Practical Mediterranean Diet Tips For UK Weight Management
Start by building your meals around vegetables, whole grains, and legumes rather than cutting food groups out. Aim for at least five portions of vegetables daily, choose wholemeal bread and brown rice, and include beans, lentils, or chickpeas several times weekly. Use olive oil as your primary fat — drizzle on salads, roast vegetables with it, and use it for low-heat cooking. Eat fish (especially oily fish like sardines, mackerel, or salmon) twice weekly for omega-3s. Limit red meat to once weekly or less, and replace processed snacks with nuts, seeds, or fruit.
The Mediterranean diet works best alongside consistent physical activity — the NHS recommends 150 minutes of moderate activity weekly. Check your current weight status using our free BMI calculator to understand your starting point, then set sustainable goals. Unlike restrictive diets, this approach is a lifestyle rather than a temporary plan, making weight loss more likely to stick long-term.
- 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.
How much weight can I expect to lose on the Mediterranean diet?
Individual results vary significantly based on starting weight, calorie deficit, and consistency. Evidence suggests sustainable loss of approximately 0.5–1 kg per week aligns with NHS guidelines. Over 3–6 months, many people lose 5–15% of body weight, which can improve blood sugar control and cardiovascular health even without reaching a target weight.
Is the Mediterranean diet suitable for weight management in the UK?
Yes. The NHS recognises the Mediterranean dietary pattern as supporting both weight loss and long-term health. It's sustainable because it's not restrictive — you eat satisfying whole foods rather than counting calories obsessively. This makes it easier to maintain than very low-calorie or elimination diets.
Can I combine the Mediterranean diet with prescription weight loss medication?
Yes. Weight loss medications like GLP-1 injections (Wegovy or Mounjaro) work best alongside dietary changes and physical activity. The Mediterranean diet's whole-food approach complements medication well. Always discuss any medication use with your GP or prescriber, as they can advise on the best combined approach for your health.
How does the Mediterranean diet compare to other weight loss diets?
The Mediterranean diet has stronger evidence for long-term sustainability and cardiovascular benefits than many alternatives. While low-carbohydrate diets produce faster initial weight loss, Mediterranean eating produces comparable long-term results with better adherence. It's less restrictive, more enjoyable, and supports overall health — not just weight loss.
What if I'm not losing weight on the Mediterranean diet alone?
If weight isn't shifting after 8–12 weeks despite consistent effort, consider whether you're in a true calorie deficit — portion sizes matter even with healthy foods. Your GP can assess whether additional support is needed, including referral to NHS weight management services or discussion of prescription weight loss options if appropriate.
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.