Drinking milk can replenish the calcium deficiency in the body and is a good way to prevent osteoporosis. Medical experts and nutritionists around the world recognize that drinking milk is the best way to supplement calcium. This is both the result of scientific experiments and the most common way to prevent osteoporosis. Milk is rich in calcium, containing 104 mg of calcium per 100 g of milk. Each bag of fresh milk (260 grams) contains about 260 mg of calcium, so if each person drinks 2 bags of fresh milk daily, they can get more than 500 mg of calcium. If you add about 400 mg of calcium absorbed from food, you can basically ensure the daily calcium needs of the body. Therefore, drinking milk for a long time can increase the body’s calcium stores, reduce calcium loss and slow down the process of osteoporosis. There are two types of milk sold in the market today, one is a compound milk with vitamin D and vitamin A added to the milk. The other is the ordinary milk without any added substances. Because vitamin D and vitamin A play an important role in the absorption process of calcium in the gastrointestinal tract, drinking compound milk is more effective in preventing osteoporosis. When drinking regular milk, you can add 1 to 2 drops of cod liver oil (cod liver oil contains a lot of vitamin D and vitamin A) or add vitamin D and vitamin A to the milk, which can also achieve the purpose of promoting calcium absorption to prevent osteoporosis. 1.Why do people have bloating and diarrhea after drinking milk? People know that drinking milk is the best way to prevent osteoporosis. However, many people experience bloating and diarrhea after drinking milk, and therefore “stay away” from milk. Experts call the phenomenon of bloating and diarrhea after drinking milk “lactose intolerance”. The reason for lactose intolerance is that milk contains a special type of sugar called lactose. Lactose cannot be absorbed directly by the body, but needs to be broken down into glucose and galactose by the action of lactase, and then absorbed by the body. When the body lacks lactase or lactase production is insufficient, the lactose in milk cannot be fully decomposed, and some of the lactose can enter the large intestine directly from the small intestine. In the intestine, lactose is fermented and irritates the intestinal mucosa, resulting in symptoms such as bloating, intestinal rumbling and diarrhea. Lactose intolerance is more common in the non-white population and also in the Han Chinese population in China. 2. What are the causes of lactase deficiency? The reason for bloating and diarrhea after drinking milk is the lack of lactase in some people’s bodies, which results in the “lactose intolerance phenomenon”. The main reasons for the lack of lactase are: (1) congenital lactase deficiency: related to genetics, mainly in newborns. In other words, some newborns are born with a lack of lactase in their bodies. These newborns will have severe bloating and diarrhea whether they drink human milk or cow’s milk. (2) Adult lactase deficiency: the most common. When the human body reaches a certain age of growth and development, the lactase enzyme decreases or disappears in the body, resulting in different degrees of bloating and diarrhea when drinking milk. The age of onset of lactase deficiency varies among adults of different races, with an average of 5 to 15 years. (3) Secondary lactase deficiency: It often occurs after certain diseases. For example, the use of certain drugs inhibits the production and activity of lactase in the body. Generally, after stopping the use of these drugs, lactase deficiency can gradually improve or disappear. In short, the phenomenon of bloating and diarrhea after drinking milk should be identified and dealt with in a targeted manner. 3.How to relieve or eliminate the phenomenon of bloating and diarrhea after drinking milk? For infants with congenital lactase deficiency, breastfeeding should be stopped, and active examination should be conducted to understand the exact cause. For adults with lactase deficiency, the following methods can be tried: (1) Drink milk several times a day in small amounts to avoid bloating and diarrhea. Because most adults with lactase deficiency are not absolutely unable to drink milk, but cannot receive large amounts of milk at one time. Therefore, you can adopt the principle of small amount and many times, and divide 1 cup of milk into several drinks, which can reduce the occurrence of abdominal distension. At the same time, drinking milk after meals is also a good way to avoid the occurrence of bloating. (2) After drinking milk bloating diarrhea is serious, you can switch to sour milk or sour milk products. Because the lactobacillus in sour milk can convert the lactose that cannot be absorbed into galactose that can be absorbed by the body. At the same time, sour milk contains a large amount of lactase which helps to alleviate the lactase deficiency in the body and promote the absorption of calcium in milk. (3) For those with secondary lactase deficiency, all efforts should be made to find out the cause of lactase deficiency, actively treat the disease causing lactase deficiency and stop using certain drugs so that the production and activity of lactase in the body can be restored to normal. Doctors and specialists should be consulted for specific cases.