(HealthDay News) -- Lactose intolerance occurs when the body can't digest lactose, a sugar found in dairy products. The U.S National Library of Medicine mentions these common reasons for lactose intolerance: The small intestine doesn't produce enough of the enzyme lactase. Premature birth. Bowel surgery. A bacterial or viral infection in the small intestine. An intestinal disease, such as celiac sprue.
(HealthDay News) -- Lactose intolerance occurs when the body can't digest lactose, a sugar found in dairy products. The U.S National Library of Medicine mentions these common reasons for lactose intolerance: The small intestine doesn't produce enough of the enzyme lactase. Premature birth. Bowel surgery. A bacterial or viral infection in the small intestine. An intestinal disease, such as celiac sprue.