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
Does Breakfast Protein Help With Weight Loss?
Yes, eating protein at breakfast may help support weight loss. Protein increases feelings of fullness, helps preserve muscle during weight loss, and can boost your metabolism slightly. Combined with a calorie deficit and regular physical activity, a high-protein breakfast is a practical strategy for sustainable weight management in the UK. The NHS recommends balancing protein with whole grains and vegetables for best results. Whether you're using prescription weight loss medication or lifestyle changes alone, breakfast choices matter.
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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 Protein Supports Weight Loss
Protein promotes satiety — it takes longer to digest than carbohydrates or fat, keeping you fuller for longer. This reduces hunger and helps prevent overeating later in the day.
Protein preserves muscle mass — during weight loss, your body needs adequate protein to maintain lean muscle. This is important because muscle burns more calories at rest than fat tissue.
Thermic effect of food — your body uses more energy digesting protein (around 20–30% of calories consumed) compared to carbs (5–10%) or fat (0–3%). This slightly increases daily calorie burn.
- Breakfast protein sources: eggs, Greek yoghurt, cottage cheese, lean meat, fish, beans, lentils, nuts, seeds
- Aim for 25–30g of protein at breakfast for optimal satiety
- Combine protein with fibre (oats, wholemeal bread) for sustained energy and appetite control
Research shows that high-protein breakfasts reduce afternoon snacking and support adherence to a reduced-calorie diet — essential for weight loss.
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.
Breakfast Protein and Weight Management Medication
If you're using prescription weight loss medication like Wegovy (semaglutide) or Mounjaro (tirzepatide) — both available in the UK through NHS specialist services or private prescription — breakfast protein becomes even more important.
These GLP-1 medications reduce appetite and slow stomach emptying, meaning smaller meal portions feel satisfying. A protein-rich breakfast ensures you're getting adequate nutrition despite eating less overall. Use our free GLP-1 weight loss calculator to estimate potential weight loss outcomes, and track your progress with our free progress tracker as you combine breakfast changes with any medication you're prescribed. Always consult your GP or prescriber before making significant dietary changes alongside weight loss medication.
- 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 protein should I eat at breakfast for weight loss?
The NHS recommends around 25–30g of protein at breakfast. This is roughly equivalent to 3 eggs, 150g Greek yoghurt, or a palm-sized portion of lean meat. Combined with fibre and balanced with other nutrients, this supports satiety and sustainable weight loss without extreme restriction.
What's the best high-protein breakfast for weight loss?
Combine protein sources with whole grains and vegetables. Examples: scrambled eggs on wholemeal toast with tomatoes, Greek yoghurt with granola and berries, or porridge with nuts and seeds. The combination of protein, fibre, and micronutrients provides sustained energy and appetite control.
Does protein at breakfast boost metabolism?
Yes, slightly. Protein has a higher thermic effect (20–30% of calories burned during digestion) compared to carbs or fat. A protein-rich breakfast increases daily calorie burn by approximately 80–100 kcal, supporting weight loss when combined with a calorie deficit and activity.
Can I have high-protein breakfast while taking Wegovy or Mounjaro?
Yes. Prescription weight loss medications reduce appetite, so adequate protein at breakfast is important to meet nutritional needs. Start with smaller portions if nausea occurs (a common side effect), and always inform your prescriber about dietary changes.
How does breakfast protein fit into the NHS weight loss approach?
The NHS recommends balanced, sustainable eating patterns rather than extreme restriction. A high-protein breakfast supports this by reducing hunger, preserving muscle during weight loss, and helping you stick to a calorie deficit. Use our free BMI calculator to track your progress alongside breakfast changes.
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.