There are too many opinions about milk, a daily food. It is generally believed that milk is the best food to supplement calcium and protein, and can even prevent cancer. However, some studies believe that dairy products led by milk can also cause health problems and may even cause cancer.

Benefits of milk: preventing cancer and supplementing calcium.

Milk is rich in protein and calcium, so drinking milk has always been a good choice to supplement calcium and protein. At the same time, the medical community has long noticed such a phenomenon: drinking milk often has anti-cancer effect.

Japanese research institutions found that people who drink milk regularly have the lowest incidence of gastric cancer. American scientists have followed up 2000 people for 20 years and found that people who drink two or three cups of milk every day can reduce the risk of cancer 1/3. According to another study, there is an anticancer substance cla in milk fat, and its vitamins A and b2 have preventive effects on gastric cancer and colon cancer.

Harm of milk: may it cause cancer?

But just some time ago, British scientists made an amazing statement: milk will greatly increase the chances of women suffering from breast cancer and men suffering from prostate cancer.

Although scientists point out that this study is too one-sided and unreliable. But from a clinical point of view, if the environment is polluted, or hormones are used during feeding, then milk may also be polluted; At the same time, animal fat in milk contains 50% saturated fatty acid, which is also harmful to health if it is ingested excessively.

Expert opinion: drink properly.

For these two opinions, experts said that because the consumption of dairy products in China is still very low at this stage, if it is not allergic to milk, it is recommended to drink more. But you don't have to drink milk as water like westerners.

For children, experts suggest that the intake of dairy products of urban children and adolescents should be increased by 250g of milk or yogurt every day on the current basis, reaching 400-500g to meet the needs of their bone development. For adults, the new American dietary guidelines recommend drinking three glasses of milk a day.

These people are not fit to drink milk.

Milk is the first choice of patients and one of the favorite foods of the public. However, some people are not suitable for drinking milk.

Lactose intolerance: In China, many people are lactose intolerant, which leads to frequent diarrhea, abdominal pain or dizziness after drinking milk. This is because the human body lacks lactase and cannot decompose lactose. As a result, the nutrition of milk can't be absorbed and the body can't adapt. The solution for this kind of people is simple, depending on the situation, drink a small amount of milk many times, or drink lactose-free milk, milk powder, fermented yogurt, soy milk and other substitutes.

Gastrointestinal surgery patients: drinking milk is easy to produce gas and flatulence. For patients after gastrointestinal surgery, gastrointestinal function is affected, intestinal peristalsis is weakened, and intestinal flatulence is not easy to be discharged. Drinking milk is equivalent to "adding insult to injury", so it is not suitable for drinking. On the contrary, you should eat liquid diets such as radish soup, rice soup and lotus root starch.

Patients with liver cirrhosis and coma: Milk contains more protein, which will increase the blood ammonia concentration after decomposition. At this time, the patient's liver has been damaged and lost the function of transforming and decomposing ammonia. If the patient is fed again at this time, the hepatic coma can be accelerated or aggravated.

Patients with acute nephritis: protein's intake will increase the burden on the kidneys, so such patients should strictly control protein's intake in diet, and it is not suitable for drinking milk.

These combinations are not suitable for milk.

Milk+rice soup Some young mothers like to add rice soup to milk to feed their babies, but they don't know that the starch in rice soup will destroy vitamin A in milk, leading to stunted growth and weakness of infants. Therefore, when feeding infants, dairy products should be separated from rice soup. Similarly, it is wrong to add some porridge to milk to feed children.

Milk+Coffee If milk and coffee are mixed together for a long time, it will produce an unstable and indigestible emulsion, which will cause damage to the liver. If you must use milk and coffee, you'd better use skim milk.

Protein in milk+fruit/juice will form a gelatinous substance when it meets weakly acidic food such as fruit and juice, which is not easy to digest. Therefore, the time to drink juice should be separated from the time to feed milk, usually one hour.