Drinking milk like this has no nutrition and is harmful to the body.

　　1. The thicker the milk, the better

　　Some people think that the thicker the milk, the more nutrients the body will get. This is unscientific.

　　The so-called overly thick milk refers to adding more milk powder and less water to the milk, so that the concentration of the milk exceeds the normal proportion standard. Some people are afraid that fresh milk will be too light, so they add milk powder to it. And if infants and young children often eat thick milk, it will cause diarrhea、constipate , loss of appetite, or even refusal to eat, can also cause acute hemorrhagic enteritis. This is because the organs of infants and young children are delicate and cannot bear excessive burden and pressure.

　　2. The more sugar you add, the better

　　It is the "consensus" of many people that unsweetened milk is not easy to digest. Adding sugar is to increase the calories provided by carbohydrates, but it must be quantitative. Generally, 5-8 grams of sugar is added per 100 ml of milk.

　　What kind of sugar is best to add to milk? Preferably sucrose. After sucrose enters the digestive tract and is broken down by digestive juices, it becomes Grape Sugar is absorbed by the body. Glucose has low sweetness and can easily exceed the prescribed range if used too much.

　　There is also the question of when to add sugar. Add sugar and milk and heat them together, so that the lysine in the milk will react with the sugar at high temperature (80℃-100℃) to produce the harmful substance glycosyl lysine. Not only will this substance not be absorbed by the human body, it will also harm healthy . Therefore, the boiled milk should be allowed to warm (40°C-50°C) before dissolving the sugar in the milk.

　　3. Milk and chocolate

　　Some people think that since milk is a high-protein food and chocolate is an energy food, eating them at the same time must be of great benefit. This is not the case. Adding liquid milk to chocolate will cause a chemical reaction between the calcium in the milk and the oxalic acid in the chocolate to form "calcium oxalate". As a result, calcium, which originally had nutritional value, has become a harmful substance to the human body, leading to calcium deficiency, diarrhea, delayed development of children and adolescents, dry hair, easy fractures, and increased incidence of urinary tract stones.

　　4. Taking medicine with milk kills two birds with one stone

　　Some people think that it is definitely beneficial to take medicine with nutritious things. In fact, this is extremely wrong. Milk can significantly affect the body's absorption rate of drugs, making the concentration of drugs in the blood significantly lower than those of non-milk drug users in the same period of time. Taking medicine with milk can also easily form a covering film on the surface of the medicine, causing mineral ions such as calcium and magnesium in the milk to chemically react with the medicine to form non-water-soluble substances. This not only reduces the efficacy of the medicine, but may also cause harm to the body. Therefore, it is best not to drink milk within 1-2 hours before and after taking the medicine.

　　5. Add orange juice or lemon juice to milk to increase the flavor

　　Adding some orange juice or lemon juice to milk may seem like a good idea, but in fact, orange juice and lemon are both high-acid fruits, and when acid encounters the protein in milk, it will denature the protein, thereby reducing the nutritional value of the protein.

　　6. Add rice soup and porridge to milk

　　Some people believe that doing so can make nutrition complementary. In fact, this approach is very unscientific. Milk contains vitamin A, while rice soup and porridge are mainly starch. They contain lipoxygenase, which will destroy vitamin A. If children, especially infants and young children, do not absorb enough vitamin A, their development will be delayed and they will become frail and sickly. Therefore, even if it is to supplement nutrition, the two should be eaten separately.

　　7. Milk must be boiled

　　Generally, the temperature requirements for milk sterilization are not high. It takes 3 minutes at 70°C and 6 minutes at 60°C. If it is boiled and the temperature reaches 100°C, the lactose in the milk will caramelize, and caramel can induce cancer . Secondly, after boiling, the calcium in the milk will precipitate with phosphate, thereby reducing the nutritional value of the milk.

　　8. Putting bottled milk in the sun can increase vitamin D.

　　Some people learned from advertisements that calcium supplementation also requires vitamin D, and sun exposure is a good way to absorb vitamin D, so they followed the prescription and put the bottled milk in the sun. In fact, this is not worth the gain. You may gain some vitamin D from milk, but lose vitamin B1, vitamin B2 and vitamin C. Because these three major nutrients will decompose in the sun, causing some or all of them to be lost. ； Moreover, lactose will ferment in the sun, causing milk to deteriorate.

　　9. Use condensed milk instead of milk

　　Condensed milk is a milk product made by evaporating fresh milk to 2/5 of its original capacity and then adding 40% sucrose into cans. Some people are influenced by the belief that "everything concentrated is essence", so they use condensed milk instead of milk. This is obviously wrong. Condensed milk is too sweet and must be diluted by adding 5-8 times of water. But when the sweetness meets the requirements, the concentration of protein and fat is often reduced by half compared with fresh milk. If water is added to condensed milk to make the concentration of protein and fat close to that of fresh milk, the sugar content will be higher.