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
Free tracker included with every download this week
Good Lunches For Weight Loss
Choosing the right lunch is one of the most important parts of sustainable weight loss. A balanced midday meal can help you avoid afternoon hunger, reduce cravings, and maintain steady energy levels throughout the day. Whether you're managing your weight through lifestyle changes alone or alongside prescription weight loss medication, getting lunch right makes a real difference. This guide covers evidence-based lunch ideas, portion sizes, and practical strategies that work for UK adults trying to lose weight.
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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.
What Makes a Good Weight Loss Lunch?
A weight-loss-friendly lunch should contain protein, fibre, and healthy fats to keep you satisfied until dinner. According to NHS weight management guidance, a balanced lunch typically includes: a palm-sized portion of lean protein (chicken, fish, tofu, or lentils), at least half your plate filled with vegetables or salad, and a small portion of complex carbohydrates like whole grain bread or brown rice.
- Protein: Helps maintain muscle during weight loss and increases satiety. Aim for 25–30g per lunch.
- Fibre: Found in vegetables, whole grains, and pulses — promotes fullness and supports digestive health.
- Healthy fats: Olive oil, nuts, or avocado in small amounts enhance flavour and satisfaction without excessive calories.
The NHS recommends a balanced approach to weight loss that includes regular meals rather than skipping lunch, which can lead to overeating later. Use our free BMI calculator above to understand your current weight category, and remember that even modest weight loss of 5–10% of body weight can have meaningful health benefits.
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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 Lunch Ideas For Weight Loss
Packed lunch ideas: Grilled chicken salad with olive oil dressing, tuna and vegetable wholemeal sandwich (one slice of bread), or lentil soup with a side salad. Quick options: Greek yoghurt with berries and nuts, hummus with raw vegetables and pitta, or a stir-fried vegetable and tofu mix with brown rice.
If you're using prescription weight loss medication like GLP-1 injections (such as Mounjaro or Wegovy), you may naturally eat smaller portions. In this case, focus on nutrient density rather than quantity — a smaller lunch with plenty of protein and vegetables is more beneficial than a larger, less nutritious meal. Track your progress using our free progress tracker to see how your lunch choices affect your overall weight management goals.
- 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 many calories should a weight loss lunch contain?
The NHS suggests a modest calorie deficit of around 500 calories per day for sustainable weight loss of approximately 0.5kg per week. A typical lunch might contain 400–600 calories, depending on your overall daily allowance and individual activity level. Your GP can provide personalised guidance based on your health.
Is skipping lunch a good weight loss strategy?
No. Skipping lunch often leads to excessive hunger, poor food choices, and overeating later in the day. Regular, balanced meals — including lunch — are recommended by the NHS for sustainable weight management and stable energy levels.
Can I eat the same lunch every day for weight loss?
Yes, meal repetition can simplify weight loss and reduce decision fatigue. However, varying your lunches ensures you get a wider range of nutrients. Aim for variety within a pattern — for example, rotate between 3–4 favourite balanced lunch options.
What if I'm taking weight loss medication like Mounjaro or Wegovy?
These prescription medications may reduce your appetite, so you might eat smaller portions naturally. Focus on nutrient-dense foods — protein, vegetables, and whole grains — to ensure adequate nutrition even if eating less. Always consult your prescriber about dietary changes alongside medication.
How can I work out my ideal lunch size?
Use our free BMI calculator and weight loss calculator above to understand your current weight category and projected weight loss potential. Track your lunch portions and overall daily intake using our progress tracker. Your GP or a registered dietitian can also provide personalised portion guidance based on your health profile.
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.