1978年,美国儿科协会提出“乳糖不耐受综合征(lactose intolerance)”的概念[1],指服用乳糖或含乳糖食物后出现的一种或多种临床不适表现,如腹痛、腹泻、恶心、腹胀等,症状严重程度有较大个体差异,取决于进食乳糖量、乳糖酶缺乏程度、食物形态等。这一临床综合征的病因多样,包括乳糖酶活性不足、摄入乳糖量过多等,关键是乳糖酶活性绝对或 In 1978, the American Academy of Pediatrics proposed the concept of “lactose intolerance” [1], which refers to one or more clinical manifestations of symptoms such as abdominal pain and diarrhea that occur after lactose or lactose-containing foods , Nausea, bloating, etc., the severity of the symptoms have larger individual differences, depending on the amount of lactose intake, lactase deficiency, food form. The clinical syndrome of various causes, including lack of lactase activity, excessive intake of lactose, etc., the key is the activity of lactase absolute or