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 Breakfast for Weight Loss
A good breakfast for weight loss should be high in protein and fibre, low in refined sugars, and help you feel satisfied until lunch. Starting the day with the right nutrients can reduce hunger throughout the morning, support better food choices later, and make weight management UK easier to sustain. Whether you're following NHS weight loss guidance or considering prescription weight loss medication, breakfast sets the tone for your entire day's eating patterns.
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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.
What Makes a Good Weight Loss Breakfast?
The best breakfasts for weight loss combine three key elements: protein, fibre, and healthy fats. Protein helps you feel fuller for longer and preserves muscle during weight loss. Fibre slows digestion and prevents rapid blood sugar spikes that trigger hunger. Healthy fats (from nuts, seeds, avocado) add satiety without excess calories.
Evidence-based breakfast options include:
- Greek yoghurt with berries and granola — high protein, supports appetite control
- Scrambled eggs on wholemeal toast — complete protein and fibre
- Porridge with ground flaxseed and banana — sustained energy, promotes fullness
- Avocado on sourdough with poached egg — healthy fats plus protein
- Cottage cheese with almonds and apple — high protein, nutrient-dense
Avoid high-sugar cereals, pastries, and white bread — these cause rapid blood sugar rises followed by hunger crashes. Aim for 25–30g protein and 5–10g fibre per breakfast to maximise appetite control.
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 and Weight Loss Medication
If you're taking GLP-1 weight loss injections (such as prescription weight loss medication), breakfast choices become even more important. These medications slow gastric emptying, meaning food stays in your stomach longer, which may reduce appetite. However, this can also cause nausea if you eat too quickly or choose heavy, fatty foods.
For prescription weight loss UK users, smaller, protein-rich breakfasts are often better tolerated. Egg-based meals, Greek yoghurt, or oatmeal with nuts work well. Avoid greasy fry-ups early in treatment. Use our GLP-1 weight loss calculator to see how medication combines with dietary changes, and track your progress with our free progress tracker to monitor what breakfast choices work best for you.
- 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 food for weight loss?
Eggs are excellent — high in protein (6g per egg), they promote fullness and contain choline, which supports metabolism. Greek yoghurt is another top choice — a 100g serving provides 10g protein with minimal calories. Both beat sugary cereals for weight management.
Should I skip breakfast to lose weight faster?
No. NHS guidance supports eating regular meals, including breakfast. Skipping breakfast often leads to overeating later and poorer food choices. A balanced breakfast actually supports sustainable weight management by stabilising blood sugar and reducing midday hunger.
How many calories should a weight loss breakfast be?
Aim for 300–400 calories depending on your overall calorie deficit. A sustainable weight loss requires roughly a 500 kcal daily deficit for 0.5kg per week loss. Breakfast should provide energy without consuming your entire allowance, leaving room for lunch and dinner.
Can I have coffee and toast for breakfast?
Plain toast and coffee lacks protein and fibre — you'll likely feel hungry within 2 hours. Add protein: peanut butter on toast, cheese, eggs, or Greek yoghurt alongside your coffee. This combination keeps you satisfied longer and supports better weight loss outcomes.
Does breakfast timing matter for weight loss?
Timing is less important than overall diet quality and calorie deficit. Whether you eat breakfast at 7am or 10am, consistency matters more. Some people benefit from intermittent fasting (eating within a shorter window), but this only works if you maintain a calorie deficit throughout the day.
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.