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
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Does the Egg Diet Work for Weight Loss?
The egg diet is a low-carbohydrate, high-protein eating plan that centres on eggs as the main protein source. While eggs are nutritious and may support weight loss when part of a calorie deficit, the egg diet alone is not endorsed by the NHS as a long-term weight management solution. This guide explains how the egg diet works, what evidence shows, and how it compares with evidence-based approaches to sustainable weight loss in the UK. For personalised advice, your GP can discuss what dietary approach suits your individual health needs.
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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.
How the Egg Diet Works for Weight Loss
The egg diet typically involves eating primarily eggs — boiled, fried, or scrambled — alongside non-starchy vegetables and limited carbohydrates. Eggs are high in protein and low in carbohydrates, which may help you feel fuller for longer and support a calorie deficit. Protein increases satiety (fullness) and has a higher thermic effect than carbohydrates, meaning your body uses more energy digesting it.
Most egg diet plans restrict refined carbohydrates, bread, pasta, and added sugars. Some versions are stricter than others — some allow additional protein sources like chicken or fish, whilst others centre almost exclusively on eggs.
- Typical daily intake: 6–8 eggs, non-starchy vegetables, limited dairy
- Calorie target: Usually 1,200–1,500 kcal per day, depending on the version
- Expected weight loss: Rapid initial loss (often 2–4 lbs per week) due to water loss and low carbohydrates, but individual results vary significantly
Weight loss from the egg diet is primarily driven by the calorie deficit, not the eggs themselves. Any low-calorie diet produces weight loss if sustained.
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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.
What Evidence Shows About the Egg Diet
Scientific evidence on the egg diet specifically is limited — most studies focus on protein and eggs in general diets, not on eggs as the sole protein source. Research does show that eating more protein supports weight loss alongside other dietary changes and increased physical activity. Eggs are an affordable, nutrient-dense protein source containing choline, lutein, and B vitamins.
However, the NHS and NICE recommend sustainable, balanced weight loss approaches rather than restrictive single-food diets. gradual weight management often leads to muscle loss, nutritional deficiencies, and difficulty maintaining the weight loss long-term. The NHS suggests losing weight at a rate of 0.5–1 kg per week through a moderate calorie deficit, increased activity, and behaviour change — not extreme restriction.
For sustainable weight management in the UK, use our free BMI calculator to check your starting point, then discuss evidence-based options with your GP, including referral to NHS specialist weight management services if appropriate.
- 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.
Will the egg diet work for weight loss?
Eggs are high-protein and low-carbohydrate, which may support weight loss by increasing fullness and creating a calorie deficit. However, weight loss comes from eating fewer calories overall, not from eggs specifically. Any calorie-restricted diet produces weight loss if sustained. Individual results vary depending on how strictly you follow the diet and your overall lifestyle.
Is the egg diet safe long-term?
The egg diet is very restrictive and is not recommended by the NHS for long-term weight management. Very restrictive diets can lead to muscle loss, nutritional deficiencies (lack of fibre, some vitamins and minerals), and are difficult to sustain. For sustainable weight loss, the NHS recommends a balanced, moderate calorie deficit alongside increased physical activity and behaviour change.
How does the egg diet compare to NHS weight loss guidance?
The NHS recommends sustainable weight loss of 0.5–1 kg per week through a balanced diet with a moderate calorie deficit, increased activity, and lifestyle changes. The egg diet typically produces faster initial weight loss (often water loss from low carbohydrates), but this is harder to maintain. The NHS approach aims for long-term health improvement, not just gradual weight management.
What's the difference between gradual weight management and sustainable weight loss?
gradual weight management (more than 1.5 kg per week) often includes water loss and muscle loss. Sustainable weight loss at 0.5–1 kg per week preserves muscle, allows your body to adapt, and is easier to maintain long-term. Muscle tissue supports metabolism, so preserving muscle is important for sustained weight management over time.
Should I try the egg diet or speak to my GP about weight loss options?
For personalised weight loss advice, your GP is the best starting point. They can assess your individual health, discuss whether weight loss is appropriate for you, and refer you to NHS weight management services if needed. The NHS offers evidence-based support including specialist dietary advice, behaviour change programmes, and prescription weight loss medication where appropriate for certain individuals.
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.