Milk contains many nutrients needed by human body, such as protein, fat, carbohydrate, trace elements such as calcium, iron, zinc, selenium, and vitamins A and B.

There are 20 kinds of amino acids that make up the protein of human body, of which 8 kinds can't be synthesized by human body (there are 9 kinds in infants, and there are more histidine than adults). These amino acids are called essential amino acids. If the protein we eat contains all the essential amino acids, this protein is called total protein. Protein in milk is whole protein.

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Milk is the most comprehensive natural food, but this does not mean that drinking milk will definitely make you fat. Milk contains about 86% water, and a bag of 250g whole milk only contains 150kcal, which is equivalent to half a bowl of rice or a can of cola. However, if you eat a packet100g of biscuits, you will consume more than 450 kilocalories.

Milk makes people feel full easily. Drinking a glass of milk before meals can effectively relieve hunger and reduce appetite. The total calorie intake in the end is not higher than that of those who don't drink milk. If you use two cups of milk instead of dinner, you may even lose weight. It should be noted that if you want to drink milk before going to bed, you should reduce the amount of food you eat at dinner and avoid taking too many calories.

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