The advantage of eating egg white instead of yolk is that it can reduce calorie intake, which is conducive to weight control; however, it may also lead to a lack of high-quality fatty acids, vitamins, minerals and other nutrients. Egg white is characterized by low calorie, high quality protein, can provide the body with eight essential amino acids. 100 grams of egg white contains 48 calories, of which 0.73 grams of carbohydrates, 10.9 grams of protein, 0.17 grams of fat. But minerals and vitamins are relatively scarce. Egg yolks are higher in calories and contain more fat and cholesterol, while vitamins and minerals are also extremely rich compared to egg whites. Every 100 grams of egg yolk contains 317 calories, of which 3.59 carbohydrates. 15.86 grams of protein, 26.54 grams of fat, calcium 129 milligrams, iron 2.73 milligrams, phosphorus 390 milligrams, potassium 109 milligrams. Egg yolk can provide the body with a large amount of high-quality protein and lecithin, which is good for health. Although its cholesterol content is high, cholesterol is also one of the essential nutrients for the human body. Therefore, it is recommended to consume egg white and egg yolk in moderation, one egg white and one egg yolk per day can meet the nutritional needs of the body, it is not recommended to eat only egg white without yolk, and eggs should be combined with other nutrients, such as milk, staples, vegetables, fruits, etc., to achieve a balanced diet, which is conducive to good health. People who are allergic to eggs should not eat egg whites and yolks.