很多人在喝完牛奶后都有过不愉快的经历,牛奶喝下去后半小时至两小时,会出现胀气、腹痛、恶心、呕吐或拉肚子等症状,与牛奶过敏症状相似,但这种现象却不是牛奶中的蛋白质造成的,而是乳糖不耐症。牛奶中有大约5%是乳糖,乳糖是一种大分子,它必须要在乳糖酶的作用下在小肠中分解成较小的 Many people have had an unpleasant experience after drinking milk. After half an hour to two hours after drinking the milk, flatulence, abdominal pain, nausea, vomiting or diarrhea and other symptoms are similar to milk allergy symptoms, but this phenomenon is not Milk caused by protein, but lactose intolerance. About 5% of milk is lactose, a macromolecule that must be broken down by the action of lactase in the small intestine into smaller