From the point of view of nutrition and health, boiled eggs with shells are better, followed by boiled eggs without shells. Then there is fried eggs, because the frying temperature is high and it is easy to destroy vitamins after a long time, which may form some substances harmful to health. Braised eggs are probably unsanitary, the salt content usually exceeds the standard, and because of the long dehalogenation time, the nutrition loss is the most. Boiled eggs are a very healthy way to eat. Every100g of egg contains protein14.7g, mainly ovalbumin and ovalbumin, and contains 8 kinds of amino acids necessary for human body, which is very similar to the composition of human protein. The absorption rate of egg protein by human body can be as high as 98%. Every100g of egg contains11~15g of fat, which is mainly concentrated in yolk and easily digested and absorbed by human body. Egg yolk is rich in lecithin, sterol, egg yolk, calcium, phosphorus, iron, vitamin A, vitamin D and B vitamins.