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 Mounjaro Diet Recipes & Meal Ideas for UK Users
If you're taking Mounjaro (tirzepatide) as a prescription weight management injection, choosing the right foods can help you manage side effects and support your weight loss journey. This guide provides practical, free diet advice and simple recipe ideas suited to Mounjaro users, based on NHS nutritional guidance and evidence from GLP-1 research. We'll cover which foods work best, portion sizes, and how to adapt your meals as your appetite naturally decreases.
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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.
Foods That Work Well With Mounjaro Treatment
When taking Mounjaro, many people experience reduced appetite and changes in how food feels satisfying. Protein-rich foods are essential—they help preserve muscle during weight loss and support satiety. Good options include lean chicken, fish, eggs, low-fat yoghurt, and beans. Soft or easily digestible foods reduce nausea risk, particularly in the first few weeks of treatment: porridge, scrambled eggs, soups, mashed vegetables, and smoothies are well-tolerated. Avoid fried, high-fat, and heavily spiced meals initially, as these may trigger nausea or indigestion.
Start with smaller portions than you're used to—Mounjaro slows gastric emptying, so smaller meals feel fuller longer. Hydration is critical: constipation is common, so drink at least 2 litres of water daily and include high-fibre foods like broccoli, sweet potato, and wholegrain bread once your digestion settles. Include foods rich in micronutrients—your GP may recommend vitamin supplementation, as gradual weight management can affect nutrient absorption.
Weight 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 Eligibility & Getting Mounjaro on Prescription
Mounjaro is available in the UK through NHS tier 3 specialist weight management services or via private prescription. On the NHS, you'll typically need a BMI of 30 or above, or 27–29.9 with weight-related health conditions like type 2 diabetes or high blood pressure. Access requires a referral from your GP to a specialist service—waiting times vary significantly by region (ICB area). Private prescribing via a UK-licensed online provider offers faster access without NHS referral, though you'll pay for the medication directly.
Your prescriber will assess whether Mounjaro is suitable and which starting dose (usually 2.5 mg) is appropriate for you. The Mounjaro KwikPen delivers once-weekly injections, with doses escalating every 4 weeks from 2.5 mg up to a maximum of 15 mg. Use our GLP-1 weight loss calculator above to estimate potential weight loss outcomes at different doses—individual results vary based on diet, activity, and adherence.
When starting Mounjaro, simple, bland meals are your friend. First-week meal ideas: scrambled eggs on white toast, plain white rice with boiled chicken, vegetable soup with crusty bread, porridge with banana, or soft pasta with tomato sauce. As weeks progress and side effects settle, gradually introduce more variety and texture. Use your free progress tracker to log your weight and how different foods make you feel—this personalises your approach far better than generic diet plans.
Remember: Mounjaro works best alongside reduced-calorie eating and increased physical activity. There's no clinically supported recipe, but finding foods you enjoy that are gentle on your stomach makes adherence much easier. If nausea or constipation become problematic, speak to your GP or prescriber—they may suggest dose adjustments or recommend specific supplements.
- 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 eat normally while taking Mounjaro?
Most people find their appetite naturally decreases on Mounjaro, so normal portion sizes feel too large. You'll likely eat less without consciously restricting. Start with smaller meals and eat slowly—you'll feel fuller faster. If nausea occurs, stick to soft, bland foods temporarily.
Are there foods I should avoid on Mounjaro?
Avoid high-fat, fried, and heavily spiced foods initially, as these can trigger nausea or indigestion. Alcohol may also worsen side effects. As your body adjusts, most foods become tolerable again—focus on balance and portion control rather than elimination.
Is there a specific Mounjaro diet plan I need to follow?
No specific Mounjaro diet exists. The NHS recommends a balanced, reduced-calorie diet: lean protein, whole grains, plenty of vegetables, and healthy fats. Mounjaro simply makes it easier to eat less. Work with a dietitian if available on the NHS, or use evidence-based guidelines.
Will I need vitamin supplements while taking Mounjaro?
Possibly. gradual weight management can reduce nutrient absorption. Your GP may recommend a multivitamin, vitamin B12, or iron supplement. Discuss this at your clinic review—blood tests can identify any deficiencies.
How can I track what foods work best for me on Mounjaro?
Log your meals and how you feel using our free progress tracker. Note which foods cause nausea, constipation, or bloating, and which support your goals. This personal data is more useful than generic meal plans and helps you and your prescriber make informed adjustments.
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.