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
Breakfasts for Weight Loss: What to Eat
Starting your day with the right breakfast can make a real difference to your weight management UK goals. A nutritious morning meal stabilises blood sugar, reduces cravings later in the day, and helps you avoid overeating at lunch. Whether you're following a calorie-controlled diet or exploring weight loss options, breakfast choices matter. This guide covers evidence-based breakfast ideas that support sustained, healthy weight loss without leaving you hungry by mid-morning.
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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.
Best Breakfast Foods for Weight Loss
The most effective breakfasts for weight loss focus on protein, fibre, and whole foods that keep you satisfied. These nutrients slow digestion, stabilise blood glucose, and reduce the hunger hormones that drive cravings later.
- Eggs — whole eggs provide complete protein and choline; two eggs with wholemeal toast is approximately 300 kcal and highly satiating
- Greek yoghurt — contains 10–15g protein per 100g; pair with berries and granola for fibre
- Oats — beta-glucan fibre promotes fullness; steel-cut oats release energy slowly, avoiding blood sugar spikes
- Nuts and seeds — almonds, chia seeds, and flaxseeds add healthy fats and fibre; a small handful (30g) provides approximately 160 kcal and sustained energy
- Berries — blueberries and raspberries are low in calories (60 kcal per 100g) but rich in antioxidants and fibre
Aim for 25–30g protein and 10g+ fibre at breakfast. This combination typically keeps most adults satisfied for 3–4 hours, reducing the urge to snack.
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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.
Breakfast Portion Sizes and Calorie Balance
For sustainable weight loss, the NHS recommends a modest calorie deficit: approximately 500 kcal per day for a safe loss of 0.5–1 kg weekly. Breakfast typically represents 20–25% of daily intake, so aim for 300–500 kcal depending on your total target.
Practical portion guides: One medium egg = 70 kcal; 30g oats = 110 kcal; 100ml milk = 60 kcal; one slice wholemeal toast = 80 kcal. Use our free weight converter to understand portion weights, and track your progress with our progress tracker as you adjust breakfast portions to fit your personal calorie balance.
- 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 for weight loss if I'm in a rush?
Greek yoghurt with granola and berries (5 minutes), or a quick porridge made with oats, milk, and a banana. Both provide protein and fibre to keep you full. Aim for at least 15g protein. Prepare overnight oats the evening before for zero morning time.
Does skipping breakfast help with weight loss?
No — skipping breakfast often leads to overeating at lunch and choosing higher-calorie snacks mid-morning. A balanced breakfast with protein and fibre reduces overall daily calorie intake and supports better food choices. NHS guidance recommends regular meals.
Can I eat cereal for weight loss breakfast?
Most commercial cereals are high in sugar and low in fibre, spiking blood glucose and leaving you hungry by mid-morning. Choose high-fibre cereals (8g+ per serving) with no added sugar, or switch to oats, muesli, or granola. Always check labels for actual fibre content.
How does breakfast affect GLP-1 weight loss medication?
GLP-1 medications like Wegovy work by reducing appetite and slowing stomach emptying. A protein-rich breakfast supports this effect naturally. Avoid large, fatty breakfasts which can increase nausea risk. Smaller, nutrient-dense meals work better with prescription weight loss treatment.
Should I count calories at breakfast for weight loss?
Awareness of calorie intake helps — use our free GLP-1 weight loss calculator to estimate your daily needs. However, focus on satiety: if a 350 kcal breakfast keeps you full until lunch without cravings, it's working. Quality matters as much as quantity for sustainable weight loss UK outcomes.
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.