The egg diet is a short-term, high-protein eating plan built around eggs as the primary food source, promising dramatic weight loss in just 10-14 days. While the idea of shedding 10kg in 10 days is alluring, this claim is not grounded in human physiology and requires a closer look at the science. This article examines how the egg diet actually works, what results you can realistically expect, and provides a complete guide including a full meal plan.
What Is the Egg Diet and How Does It Work?
The egg diet is a short-term, high-protein, low-carbohydrate eating plan where eggs form the base of every meal, often paired with non-starchy vegetables and lean proteins. It works through two combined mechanisms: a steep calorie reduction from cutting most carbohydrates and processed foods, and the appetite-suppressing effect of protein. Eggs are one of the most protein-dense foods available, with each large egg delivering 6-7 grams of complete protein, and protein requires 20-30% of its own calories just to digest through a process called the Thermic Effect of Food (TEF). This means your body burns more calories processing a protein-heavy meal than it does digesting carbohydrates or fat.
The second mechanism is glycogen depletion, as your body stores 300-500 grams of carbohydrates as glycogen in the liver and muscles, with each gram binding 3-4 grams of water. When you cut carbs sharply, glycogen stores empty within the first 2-3 days and that bound water leaves the body, producing fast, visible scale movement early in the diet. However, it is crucial to understand that this initial loss is water, not fat.
Why 10kg in 10 Days Is Not Realistic – and What You Can Actually Lose
The “10kg in 10 days” claim circulates widely online, but it is not grounded in physiology. To lose 1 kg of actual body fat, you need a calorie deficit of approximately 7,700 calories, meaning to lose 10 kg of fat in 10 days you would need a daily deficit of 77,000 calories. This is physically impossible given that most adults burn only 1,600-2,500 calories per day total (Tua Saúde, 2024). What you can realistically expect over 10 days is a combination of water loss and modest fat loss.
- Water weight (glycogen depletion): 1.5 – 3 kg, occurring on Days 1-3
- Fat loss: 0.7 – 1.4 kg, occurring on Days 4-10
- Total realistic loss: 2.5 – 5 kg over the full 10 days
A 2020 review in The Journal of Nutrition found that participants on high-protein, calorie-restricted diets lose an average of 0.5-1.5 kg per week, with the most significant losses occurring in the first two weeks. The first 3-4 days show dramatic scale movement because of water loss, but after day 4 the body shifts into fat-burning mode and the rate of loss slows, which is normal and expected rather than a sign the diet has stopped working.
What Eggs Actually Do for Weight Loss
Eggs are genuinely effective as a weight-loss food, and the evidence is specific and worth understanding. A clinical trial at Pennington Biomedical Research Center found that participants on a 1,000 calorie-deficit diet who ate an egg-based breakfast showed 65% greater weight loss, 61% greater reduction in BMI, and 34% greater reduction in waist circumference compared to those eating a bagel-based breakfast with equivalent calories (Vander Wal et al., International Journal of Obesity, 2008). The advantage is not magic but satiety, as eggs keep you full longer than most breakfast foods of equal caloric value, reducing total daily intake without requiring conscious restriction at every meal.
A 2025 review published in Poultry Science covering studies from 2002 to 2022 found that moderate egg consumption exerts minimal effect on blood lipid levels, as the body regulates its own cholesterol production in response to dietary intake. This means the long-held fear of eating eggs daily for heart health is not supported by current evidence for most healthy adults, making eggs a safe and effective tool for weight loss when consumed as part of a balanced, calorie-controlled diet.
How the 10-Day Egg Diet Works: Phase by Phase
The 10-day egg diet is structured into two distinct phases that maximize initial water loss before transitioning into steady fat burning. Phase 1, lasting days 1-3, focuses on rapid glycogen depletion through severe carbohydrate restriction, resulting in the most dramatic scale movement. During this phase, meals consist primarily of eggs, lean proteins like chicken or fish, and non-starchy vegetables such as spinach, broccoli, and zucchini. Phase 2, from days 4-10, shifts the body into ketosis and steady fat burning, where you can introduce slightly more variety while maintaining a high protein intake and strict calorie control.
Throughout both phases, it is essential to drink at least 8-10 glasses of water daily, avoid all sugars, grains, and processed foods, and never skip meals to prevent blood sugar crashes. The diet is designed to be short-term only, as it lacks sufficient carbohydrates and fiber for long-term health, and should not be extended beyond 14 days without medical supervision.
The 10-day egg diet does not work the same way from day one to day ten. Understanding each phase helps you interpret what is happening and stay consistent.
Days 1-3: Glycogen Depletion Phase
Your body burns through stored carbohydrates first. The scale drops fast – often 1.5-2.5 kg in this window. You may experience low energy, mild headaches, or irritability as your metabolism adjusts. This is temporary and typically resolves by day 4.
Days 4-7: Fat-Burning Phase
With glycogen largely cleared, your body begins pulling energy from stored fat. Weight loss slows compared to the first three days, but this is the actual fat loss. The rapid weight loss observed in the early phase is primarily caused by the body clearing stored carbohydrates and water, while simultaneously lowering insulin levels to encourage fat burning.
Days 8-10: Adaptation Phase
Your metabolism has now adjusted to the lower calorie intake. Weight loss continues but at a steadier, slower pace. Hunger generally decreases as your body adapts to running on protein and fat.
Full 10-Day Egg Diet Meal Plan
This plan targets approximately 1,200-1,400 calories per day. Anyone below 1,200 calories per day should only do so under medical supervision (BetterMe, 2025).
Allowed on this plan: eggs (any preparation without frying in oil), non-starchy vegetables, lean proteins (chicken breast, fish), small portions of fruit, water, and unsweetened black coffee or green tea consumed separately from meals.
Not allowed: bread, pasta, rice, sugar, alcohol, processed snacks, full-fat dairy in large amounts.
Day 1
| Meal | What to Eat |
|---|---|
| Breakfast | 3 boiled eggs + sliced cucumber + black coffee |
| Lunch | 2 boiled eggs + grilled chicken breast (100g) + salad greens |
| Dinner | 2 boiled eggs + steamed broccoli + lemon water |
Day 2
| Meal | What to Eat |
|---|---|
| Breakfast | 3 boiled eggs + half a grapefruit |
| Lunch | 2 boiled eggs + tuna (canned in water, 100g) + sliced tomato |
| Dinner | 3 boiled eggs + saut̩ed spinach (no oil Рuse water or dry pan) |
Day 3
| Meal | What to Eat |
|---|---|
| Breakfast | 2 boiled eggs + 1 medium apple |
| Lunch | 3 boiled eggs + grilled fish (150g) + cucumber salad |
| Dinner | 2 boiled eggs + steamed green beans + black coffee |
Day 4
| Meal | What to Eat |
|---|---|
| Breakfast | 3 boiled eggs + sliced tomato |
| Lunch | 2 boiled eggs + grilled chicken (100g) + mixed greens |
| Dinner | 2 boiled eggs + stir-fried zucchini (water only) |
Day 5
| Meal | What to Eat |
|---|---|
| Breakfast | 2 scrambled eggs (dry pan) + 1 small orange |
| Lunch | 3 boiled eggs + grilled salmon (100g) + lettuce |
| Dinner | 2 boiled eggs + steamed asparagus |
Day 6
| Meal | What to Eat |
|---|---|
| Breakfast | 3 boiled eggs + half a grapefruit |
| Lunch | 2 boiled eggs + shrimp (100g, boiled) + cucumber |
| Dinner | 3 boiled eggs + steamed broccoli + lemon water |
Day 7
| Meal | What to Eat |
|---|---|
| Breakfast | 2 boiled eggs + 1 apple |
| Lunch | 3 boiled eggs + grilled chicken (120g) + salad greens |
| Dinner | 2 boiled eggs + roasted cauliflower |
Day 8
| Meal | What to Eat |
|---|---|
| Breakfast | 3 boiled eggs + sliced tomato + black coffee |
| Lunch | 2 boiled eggs + tuna (100g) + mixed greens |
| Dinner | 2 boiled eggs + steamed spinach |
Day 9
| Meal | What to Eat |
|---|---|
| Breakfast | 2 boiled eggs + half a grapefruit |
| Lunch | 3 boiled eggs + grilled fish (150g) + cucumber salad |
| Dinner | 2 boiled eggs + steamed green beans |
Day 10
| Meal | What to Eat |
|---|---|
| Breakfast | 3 boiled eggs + 1 small apple |
| Lunch | 2 boiled eggs + grilled chicken (120g) + lettuce |
| Dinner | 2 boiled eggs + steamed broccoli + lemon water |
Drink a minimum of 2.5-3 litres of water per day throughout. Green tea and coffee contain tannins, which can block iron absorption. Consume them separately from meals, not alongside eggs, particularly for women who are already managing iron levels.
Side Effects to Know Before You Start
Side Effects and Risks
The egg diet is a restrictive plan and produces side effects in most people, particularly in the first three days. Possible risks include fatigue, headaches, mood changes, dizziness, and general discomfort, often associated with electrolyte imbalances – sometimes called “induction flu.” The diet may also cause yo-yo effects, especially if followed for more than 14 days or without supervision.
Additional concerns include the following:
- Nutrient gaps: Eggs are deficient in selenium, zinc, vitamin A, and vitamin D (BetterMe, 2025). A 10-day plan without vegetable variety makes these gaps worse.
- Cholesterol monitoring: While current evidence suggests eggs do not raise cholesterol for most healthy adults, anyone with a history of high cholesterol should check with their doctor first.
- Kidney strain: High protein intake over extended periods can place stress on kidneys. People with pre-existing kidney conditions should not follow this diet (Kuhn et al., Journal of Renal Nutrition, 2019).
- Weight regain: Some water weight returns when carbohydrates are reintroduced, as glycogen re-binds water in muscle tissue. This is not fat regain but it will move the scale upward.
Who Should Not Follow the Egg Diet
This diet is not appropriate for everyone. Do not follow this plan if you have kidney disease or reduced kidney function, a history of eating disorders, are pregnant or breastfeeding, have type 1 diabetes or are on insulin, have a diagnosed egg allergy, or are under 18 years old. If you have any chronic health condition, speak to a doctor before starting.
What to Do After the 10 Days End
The diet produces short-term results. What happens next determines whether those results last. After the egg diet, it is important to maintain a healthy, balanced eating pattern that includes fresh fruits, vegetables, legumes, whole grains, lean proteins, and low-fat dairy. To prevent muscle loss during caloric restriction, resistance training at least 3 times per week is recommended – cardio is secondary to muscle preservation.
Reintroduce carbohydrates gradually – not all at once. Start with whole grains, legumes, and fruit rather than refined carbohydrates or processed foods. Jumping straight back to a high-carb diet after 10 days of restriction is the fastest route to regaining everything lost, plus additional water weight. A 2024 meta-analysis in Clinical Nutrition ESPEN covering 47 studies and over 3,200 participants found that higher protein intake significantly prevents muscle loss during weight loss, and an intake above 1.3g per kg of body weight per day is associated with muscle preservation. Keeping protein intake high even after ending the egg diet is one of the most effective ways to maintain the results.
Frequently Asked Questions About the Egg Diet
What is the egg diet?
The egg diet is a short-term, high-protein, low-carbohydrate eating plan where eggs are the primary food at every meal. It typically runs for 10-14 days and combines the satiety of protein with a sharp reduction in calorie intake to produce fast initial weight loss.
Can you actually lose 10kg in 10 days on the egg diet?
No. Losing 10kg of body fat in 10 days would require a daily calorie deficit of 77,000 calories, which is not physically possible. Realistic total loss over 10 days is 2.5-5 kg, with the first 1.5-3 kg coming from water weight in the first three days rather than fat (Tua Saúde, 2024).
How many eggs should you eat per day on the egg diet?
Most structured plans call for 6-8 eggs per day spread across three meals. Starting with 2-3 eggs on day one and working up to 6 eggs daily over the first week reduces the risk of nausea and digestive discomfort.
Does the egg diet affect cholesterol?
For most healthy adults, moderate to high egg consumption does not significantly raise blood cholesterol because the body reduces its own internal cholesterol production in response (Poultry Science Association, 2025). However, anyone with pre-existing cardiovascular concerns should check with a doctor before following this plan for 10 days.
Why does weight loss slow down after day 3 on the egg diet?
The fast initial drop is water weight from glycogen depletion. Once glycogen stores are cleared, actual fat burning begins – which is slower by nature. A loss of 0.5-1 kg of fat per week is the expected rate at this stage and is a sign the diet is working correctly, not stalling.
What happens if you stop the egg diet early?
Stopping before day 10 still produces some benefit – you lose the water weight and any fat burned up to that point. The main risk is reintroducing carbohydrates too fast, which will restore water weight quickly and make the results look smaller than they are. Gradual reintroduction of whole-food carbohydrates minimises this effect.
No. Dietitians classify the egg diet as a short-term plan. Followed beyond 14 days, it exposes the body to nutritional deficiencies and can cause yo-yo dieting effects, frustration, and digestive problems — none of which support sustainable weight management. Use it as a short reset, not a permanent eating style.
Key Takeaways
The egg diet can produce rapid initial results, but understanding what drives those outcomes is essential for realistic expectations and long-term success. The following points summarize the most important facts.
- The egg diet works through calorie reduction, the high satiety of protein, and early glycogen-driven water weight loss — not through any special property of eggs alone.
- 10kg in 10 days is not achievable through fat loss. Realistic results are 2.5-5 kg over 10 days, with the larger part of that being water weight in the first three days.
- Eggs are genuinely effective as a weight-loss food — clinical evidence shows they produce meaningfully better results than carbohydrate-equivalent breakfasts when on a calorie deficit.
- The diet carries real risks: nutrient gaps, water weight rebound, and potential muscle loss if protein targets are not met.
- What you do after the 10 days matters as much as the 10 days themselves — gradual carbohydrate reintroduction and sustained high protein intake are the keys to keeping results.
