1. Carbohydrates: It is the main energy supply for the human body. Some people do not eat carbohydrates in order to lose weight, but in fact, these are the main functional nutrients in the human body. To have sufficient strength, we must consume carbohydrate appropriately.

2. Protein: If our body wants to function normally, we must take in a certain amount of protein. Protein provides energy for the body, but the most important function of protein is to form muscles, internal organs, body tissue, etc. and also improve immunity.

3. Fat: Many people dislike fat. In fact, as long as we do not overeat and occasionally consume some fatty foods, it will be beneficial to the health of the body. Fat is not only found in meat, many nuts also contain a lot of high-quality fats, which can maintain the health of cardiovascular and cerebrovascular.

4. Vitamins: Vitamins cannot be synthesized by our body and must be ingested through food. There are 13 kinds of common vitamins, including water-soluble and fat-soluble. Vitamins can promote the absorption and metabolism of other nutrients and protect blood vessels and tissues.

5. Minerals: Minerals are potassium, sodium, calcium, zinc and so on. The elderly and children need to consume a certain amount of trace elements every day, in order to ensure the balance of nutrition.

6. Water: Water is necessary and most important for the normal metabolism of the human body. The human body excretes a large amount of water through skin evaporation, sweat glands, respiratory tract emission and excretion every day. Therefore, it is recommended to drink 1.5L-2L of water every day so as to maintain body balance.

7. Dietary Fiber: Dietary fiber has an important role in human health. Intake of dietary fiber can keep the gut healthy.