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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Good Meal Prep Meals For Weight Loss
Meal prepping is one of the most effective ways to support weight loss in the UK. By planning and preparing nutritious meals in advance, you remove the guesswork from daily eating and make it easier to stick to a calorie deficit. This guide covers practical, healthy meal prep ideas aligned with NHS weight management principles, portion sizes, and how to combine meal prep with other weight management approaches like GLP-1 weight loss injections if prescribed by your GP. Whether you're aiming for sustainable weight loss or managing a specific health condition, smart meal prep removes barriers to healthy eating.
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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.
Meal Prep Principles For Weight Loss
Effective meal prep for weight management starts with understanding portion sizes and calorie balance. The NHS recommends a moderate calorie deficit—typically 500 calories below your daily needs—to lose around 0.5 to 1 kg per week sustainably. Meal prepping helps you control portions and track intake accurately.
Core meal prep principles:
- Build meals around lean protein (chicken breast, turkey, fish, lentils, tofu)
- Include plenty of vegetables—at least half your plate—for volume and nutrients with fewer calories
- Choose whole grains (brown rice, quinoa, oats) over refined carbohydrates
- Use healthy fats sparingly (olive oil, nuts, avocado)
- Prepare consistent portions so calories remain predictable throughout the week
- Store meals in labelled containers and track what you've eaten
Consistency matters more than perfection. Many people find that meal prepping on one day per week (typically Sunday) makes weight management much easier during busy periods.
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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.
Simple Weight Loss Meal Prep Examples
Monday-to-Wednesday meals: Grilled chicken breast (150g), roasted sweet potato (150g), and steamed broccoli with olive oil. Around 400 calories per meal.
Thursday-to-Friday meals: Baked white fish (150g), brown rice (100g uncooked), and mixed salad with lemon dressing. Around 380 calories per meal.
Lunch snacks: Greek yoghurt (100g) with berries, hummus with carrot sticks, or a small apple with almonds.
The key is choosing foods you actually enjoy—weight loss only works long-term if your meals feel sustainable, not punishing. Calculate your personal BMI and daily calorie needs using our free BMI calculator above, then adjust portion sizes accordingly. For structured support with weight management medication UK or prescription weight loss options, your GP can discuss whether approaches like GLP-1 weight loss injections might help alongside meal prep.
- 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's the best food to meal prep for weight loss?
Lean proteins (chicken, fish, turkey, tofu), non-starchy vegetables, and whole grains form the foundation. These foods are nutrient-dense, promote satiety, and support a calorie deficit. Avoid ultra-processed foods and sugary items. Variety keeps meals interesting and ensures balanced nutrition across the week.
How many calories should my meal prep meals contain?
This depends on your personal needs, but for sustainable weight loss the NHS recommends a 500-calorie daily deficit, resulting in roughly 0.5–1 kg per week loss. Most meal prep meals range 350–500 calories. Use our free BMI calculator to estimate your daily needs, then adjust portions accordingly.
Can meal prep support weight loss medication like Wegovy?
Yes. Wegovy (semaglutide) works best alongside reduced-calorie, nutritious meals. Meal prepping helps you maintain consistent, controlled portions, which supports the medication's effectiveness. Always discuss your diet plan with your prescriber when starting any prescription weight loss treatment.
How do I prevent meal prep meals from getting boring?
Rotate proteins (chicken, fish, turkey, lentils), vary vegetables seasonally, and experiment with herbs and spices. Prepare 2–3 different meals per week rather than eating the same thing daily. Freeze portions of extra meals for later, and include different textures and flavours.
Is meal prep compatible with weight management UK NHS services?
Absolutely. The NHS encourages meal planning and portion control as core weight management strategies. If you're referred to an NHS weight management service or prescribed medication, meal prep complements these approaches. Combine meal prep with increased physical activity for best results.
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.