1, resulting in calcium deficiency.
As we all know, milk has the function of supplementing calcium. Pure milk has a high content of calcium, but a higher content of phosphorus. This is the main difference between milk and breast milk. Phosphorus and calcium inhibit each other. Drinking too much pure milk can not supplement calcium, but will cause calcium deficiency. Especially the elderly, it is very likely to aggravate osteoporosis.
2, skin allergies
Pure milk contains a lot of protein, and some people are allergic to milk protein, which gets 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.
4. How much is it per day
Pure milk can be drunk within 300ml every day.
Although pure milk is extremely nutritious, it is not suitable for eating more. It is suggested to drink 65438+300ml in the morning and evening, which can not only supplement the body's nutrition, but also avoid the side effects caused by excessive drinking.
5. Preventive measures
1. Pure milk will be decomposed into lactose after eating, which requires a lot of lactase metabolism. So don't drink too much pure milk to avoid lactose intolerance.
Pure milk will produce gas when eaten. Therefore, people with gastric ulcer and flatulence are not suitable for drinking, so as not to aggravate the symptoms.
6, baby attention
(1) The thicker the milk, the better.
Excessive milk refers to adding more milk powder and less water to milk, so that the concentration of milk exceeds the normal proportion standard. Some people are afraid that fresh milk is too weak, so they add milk powder to it. Because the organs of infants and young children are delicate, eating thick milk often will cause diarrhea, constipation, loss of appetite, and even refusal to eat, and it will also cause acute hemorrhagic enteritis.
(2) The more sugar, the better.
Sugar is added to increase the calories supplied by carbohydrates, but it must be quantified. Generally, 5 ~ 8 grams of sugar is added per 100 ml of milk.
What sugar should I add to the milk? Sucrose is preferred. Sucrose enters the digestive tract, is decomposed by digestive juice, becomes glucose, and is absorbed by the human body. Glucose is low in sweetness, and it is easy to exceed the specified range when used too much.
There is also a question of when to add sugar. Sugar and milk are heated together, so that lysine in milk will react with sugar at high temperature (80℃ ~ 100℃) to generate harmful substance glycosyl lysine. This substance is not only absorbed by human body, but also harmful to health. Therefore, boiled milk should be dried to a warm temperature (40℃ ~ 50℃) before sugar is dissolved in milk.
(3) milk and chocolate
Adding chocolate to liquid milk will make calcium in milk react with oxalic acid in chocolate to produce "calcium oxalate". In this way, the originally nutritious calcium has become a substance harmful to human body, leading to calcium deficiency, diarrhea, delayed development of children, dry hair, easy fracture and increased incidence of urinary calculi.
(4) Milk can kill two birds with one stone.
Milk can obviously affect the absorption rate of drugs in human body, so that the concentration of drugs in blood is significantly lower than that of non-milk users at the same time. Taking medicine with milk is also easy to make the medicine show a covering film, so that mineral ions such as calcium and magnesium in milk react with the medicine to generate water-insoluble substances, which not only reduces the curative effect, but also may cause harm to the body. Therefore, it is best not to drink milk 1 ~ 2 hours before and after taking the medicine.
(5) Feed the baby with yogurt
Yogurt is a healthy drink to help digestion. Some parents often feed their babies yogurt. Antibiotics produced by lactic acid bacteria in yogurt can inhibit the growth of many pathogenic bacteria, but it also destroys the growth conditions of normal flora beneficial to human body and affects the normal digestive function, especially for infants and premature infants with gastroenteritis. If you feed them yogurt, they may cause vomiting and gangrenous enteritis.
(6) Add orange juice or lemon juice to milk to increase flavor.
Orange juice and lemon are fruits with high fruit acid content. When fruit acid meets protein in milk, protein will be denatured, thus reducing the nutritional value of protein.
(7) Add rice soup and porridge to the milk.
Milk contains vitamin A, while rice soup and porridge are mainly starch, which contains lipoxygenase, which will destroy vitamin A. Children, especially infants, will be stunted and sickly if they do not take enough vitamin A. Therefore, even if you supplement nutrition, you should eat the two separately.
Milk must be boiled
Usually, milk disinfection does not require high temperature, 70℃ for 3 minutes and 60℃ for 6 minutes. If boiled and the temperature reaches 100℃, the lactose in milk will be coked and caramel will induce cancer. Secondly, after boiling, calcium in milk will precipitate with phosphoric acid, thus reducing the nutritional value of milk.
(9) Bottled milk placed in the sun can increase vitamin D..
Putting bottled milk in the sun may get some vitamin D, but it will lose vitamin B 1, vitamin B2 and vitamin C ... because these three nutrients will be decomposed in the sun, so that they will be partially or completely lost; Moreover, lactose will ferment in the sun, which will make milk go bad.
(10) condensed milk instead of milk.
Condensed milk is a kind of dairy products, which is made by evaporating fresh milk to 2/5 of its original capacity and then adding 40% sucrose to cans. Some people are influenced by "concentrated essence" and use condensed milk instead of milk. This is obviously wrong. Condensed milk is too sweet and must be diluted with 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.