1, calcium deficiency

The content of calcium in milk is high, but the content of phosphorus is higher, which is the main difference between milk and breast milk. Phosphorus and calcium inhibit each other. Drinking too much milk can't supplement calcium, but it will cause calcium deficiency.

2, skin allergies

Milk contains a lot of protein, and some people are allergic to milk protein, which becomes worse with the time of drinking pure milk. Some people have poor immunity, and drinking too much pure milk is easy to cause skin allergies.

3, indigestion

The content of protein in milk is extremely high, which requires good digestion and absorption of gastrointestinal function, while the consumption of lactase and protease in the body is relatively large, and long-term consumption may affect people's digestive function.

Extended data:

Milk is one of the oldest natural drinks, known as "white blood", and its importance to human body can be imagined.

Precautions for purchasing and drinking milk:

1, you should choose "pure milk" without any additives, and choose high fat content at the same price, the quality will be better. Healthy adults and children choose whole milk, which retains the nutrients in milk to the maximum extent, is rich in fat-soluble vitamins A, D, E and K, and contains natural calcium.

People with hyperlipidemia and need to control their weight should choose low-fat milk, which is beneficial to control calories. Skim milk completely removes fat, which can stimulate gastric acid secretion.

2, drinking milk in moderation every day will not gain weight, but you can't drink milk as water. Adults drink about 300ml a day, but the total intake of dairy products should not exceed 500ml. It should be noted that drinking milk on an empty stomach will cause protein and other ingredients to enter the intestine without adequate digestion, resulting in nutrient loss.

Milk, fruit and vegetable bread or eggs, fruit and vegetable porridge are all good breakfast combinations, which make milk fully contact with saliva digestive enzymes and are more conducive to the absorption of ingredients.

3. After the milk is boiled, the protein contained in it will change from the sol state to the gel state, and the calcium in it will be precipitated by phosphoric acid, and the vitamins will be destroyed. At the same time, lactose in milk will coke at high temperature, which will affect the absorption of human body.

It is best to use "pasteurization", that is, heat the fresh milk to 62℃ for 30 minutes, or to 71℃ for 20 minutes, which can kill bacteria without affecting absorption.

Baidu encyclopedia-milk

People's Network-Drinking milk is a "technical activity"