● Health requires balanced nutrition, adequate sleep, proper exercise and healthy psychology. Basic concept of nutrition: Nutrition refers to the process that human body absorbs and uses food or nutrients, and it is also a biological process that human beings meet their physiological needs by ingesting food. Reasonable nutrition: refers to providing enough heat energy and various nutrients for the body through reasonable diet and scientific cooking, and maintaining the balance between nutrients to meet the normal physiological needs of the human body and safeguard human health. Nutrients: In order to maintain normal physiological functions and meet the normal growth and development of the body.