Eggs contain almost all the nutrients the human body needs. One of the longevity experiences of many old people is to eat an egg every day. Many health medicated diets circulated among the people in China are also inseparable from eggs. If the eggs are processed into salted eggs, the calcium content will increase obviously, which is about 10 times of that of fresh eggs, which is especially suitable for people who want to supplement calcium.

Eggs contain avidin, which will affect the absorption of biotin in food and cause symptoms such as loss of appetite, general weakness and muscle pain. Eggs will carry bacteria during the formation process, and immature eggs can't kill bacteria, which is easy to cause diarrhea.

The protein structure of raw eggs is dense, and a large part of them cannot be absorbed by human body. Only boiled eggs can soften their protein and be digested and absorbed by human gastrointestinal tract.