Human food is diverse, and there is no good or bad food. The key lies in the reasonable combination of food types and quantities, and only with a reasonable combination of food can the human body obtain the required nutrients. In order to ensure the health of the human body, the diet should contain a variety of nutrients required by the human body, but we should pay attention to never too much. There are two major categories of nutrients needed by the human body: macronutrients and micronutrients. Macronutrients include proteins, fats, carbohydrates, and micronutrients are divided into two categories: minerals and vitamins. There are seven main categories of nutrients and dietary components needed by the human body, including dietary fiber and water, in addition to the above mentioned ones, which have different functions. Protein is the material basis of life, is the main component of the body’s cellular tissue, accounting for about 16% to 19% of the body weight, is one of the body’s energy sources. I remember in a textbook image that “without protein there is no life”, its main source of animal food and soy products. Fat is now often rejected by the beauty lovers. In fact, fat is also an important component of the body and is the main form of energy storage. There are two sources of dietary fat: the fat contained in the food itself, and the cooking oil used for cooking. Dietary fats can be divided into animal fats and vegetable fats, animal fats contain more saturated fatty acids, easy to raise the body’s blood viscosity, so it is not recommended to eat more. Vegetable fats contain more unsaturated fatty acids, which can reduce blood viscosity, improve blood circulation and lower blood cholesterol and triglycerides, so it is recommended to choose peanut oil, olive oil and corn oil for daily cooking. Carbohydrates mainly provide energy for the body, and are usually the source of energy for human heart and brain activities, mainly supplied by plant foods, pay attention to the principle of coarse and fine in the diet. Vitamins are naturally present in food and can hardly be synthesized by the body, although the need is minimal, but they play an important role in the metabolism and development of the body. It is an essential nutrient to prevent a variety of nutritional deficiency diseases and is mainly found in vegetables and fruits. Minerals are an important component of the human body, accounting for 4% of the body weight. It is also an indispensable nutrient for maintaining normal physiological functions of the body. Dietary fiber has the effect of preventing constipation and promoting intestinal health, and is important for preventing high blood lipids and high blood sugar, mainly from plant foods, such as in cereals and vegetables. Drinking water can help the digestion and absorption of food, and the metabolic “waste” out of the body, but also to regulate body temperature, maintain the balance of body fluids, so it is necessary to adhere to drinking plain water every day. In the daily diet to do food diversity, coarse and fine with the appropriate number. This is the cornerstone of a healthy diet, and I hope that a healthy diet will always accompany your happy life.