Nutritional value of eggs:

1. Eggs contain almost all the essential nutrients, such as protein, fat, yolk, lecithin, vitamins, and iron, calcium, potassium, and has been called the "ideal nutrient library".

2. Eggs contain nutrients that are second only to breast milk for humans. An egg contains calories equivalent to half an apple or half a cup of milk, but it also has 8% phosphorus, 4% zinc, 4% iron, 12.6% protein, 6% vitamin D, 3% vitamin E, 6% vitamin A, 2% vitamin B, 5% vitamin B2, and 4% vitamin B6.