The benefits of eating an egg a day: 1, can improve immunity, because eggs are rich in protein, and protein constitutes the body of many immune substances raw materials, appropriate to eat an egg a day to supplement high-quality proteins, can enhance the body’s immunity. 2, can prevent muscle wasting disease, because the protein in the egg also constitutes an important raw material in the muscle, by an egg a day Supplementary protein, in the prevention of muscle wasting disease benefits are very obvious. The disadvantage of an egg a day is that it may cause hypercholesterolemia, because the yolk of the egg is rich in cholesterol, if too much intake will cause hypercholesterolemia, which will cause the high incidence of cardiovascular and cerebrovascular diseases.