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
Healthiest Breakfast for Weight Loss
Starting your day with a nutritious breakfast can support weight management and help prevent overeating later. A healthy breakfast combines protein, fibre, and healthy fats to keep you fuller for longer and stabilise blood sugar levels. The best approach depends on your individual preferences and any weight loss medication you may be taking. Whether you're managing weight through NHS weight loss programmes, dietary changes, or prescription weight loss medication, breakfast choices matter.
10,000+ calculations today · NHS-aligned thresholds · 100% free
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.
What Makes a Breakfast Good for Weight Loss?
The healthiest breakfasts for weight loss share three key features: high protein content, adequate fibre, and minimal added sugar. Protein helps you feel full and supports muscle preservation during weight loss. Fibre slows digestion and prevents blood sugar spikes that lead to hunger crashes.
- Eggs: 6–8g protein per egg, keep you satisfied for hours
- Greek yoghurt: 10–15g protein per 100g, pair with berries for fibre
- Oats: Soluble fibre helps regulate appetite; avoid sugary instant varieties
- Whole grain toast: With nut butter or avocado adds healthy fats and satiety
- Smoothies: Use protein powder, leafy greens, and frozen fruit — skip sugary juices
Studies show that high-protein breakfasts reduce daily calorie intake by approximately 400 kcal, supporting weight loss through glp-1 weight loss approaches or traditional calorie deficit methods.
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.
Foods to Avoid and Practical Tips
Breakfast cereals, pastries, and sugary drinks cause rapid blood sugar spikes followed by crashes that trigger hunger. Avoid anything with added sugar, refined grains, or full-fat dairy if you're in a calorie deficit. Instead, focus on whole foods prepared at home where you control portions and ingredients.
A simple formula: fill half your plate with vegetables or fruit, one quarter with protein, and one quarter with whole grains or healthy fats. This approach works well alongside prescription weight loss uk programmes or dietary interventions. Use our free BMI calculator above to track whether your current weight management approach is on target, and consider our weight loss projection calculator if you're exploring medication options with your GP.
- 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 breakfast if I'm taking weight loss medication?
If you're on GLP-1 medication like Wegovy or Mounjaro, eat smaller portions of high-protein foods like eggs, Greek yoghurt, or fish. These medications slow stomach emptying, so very large breakfasts may cause nausea. Start with modest portions and increase slowly as tolerated. Always follow your prescriber's guidance.
How many calories should a weight loss breakfast be?
For most adults aiming to lose weight, breakfast should be 300–400 kcal. This leaves room for lunch, snacks, and dinner within a typical 1500–2000 kcal daily target. Your individual needs depend on your height, activity level, and any medical conditions — ask your GP for personalised guidance.
Is skipping breakfast better for weight loss?
No. Skipping breakfast often leads to overeating later in the day and energy crashes. Eating a balanced breakfast with protein and fibre supports steadier energy and better appetite control throughout the morning.
Can breakfast affect how weight loss medication works?
Timing and composition matter. High-fat foods may slow medication absorption slightly. Eat breakfast 1–2 hours after taking oral medications. If taking Wegovy or Mounjaro, eat slowly and chew well — these medications slow digestion, and eating too quickly can cause discomfort.
What about porridge or muesli for weight loss?
Porridge is excellent — it's high in soluble fibre and keeps you full. Choose traditional oats, not instant packets with added sugar. Add protein with Greek yoghurt, nuts, or an egg on the side. Muesli can work if it's low-sugar and portion-controlled, but many brands contain hidden sugars — check labels carefully. ```
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.