Lactose intolerance is a cluster of gastrointestinal disorders, diarrhea, abdominal bloating, flatulence, etc that appears when there is a difficulty for the body to digest lactose and other dairy products.

Lactose is the sugar that appears naturally in milk and the body needs an enzyme that is located in the small intestine called Intestinal Lactase to digest it. This enzyme converts lactose into two smaller sugars, glucose and galactose, and allows lactose to be absorbed from the intestine.

Deficiency of intestinal lactase reduces the capacity to digest lactose, so lactose intolerance symptoms appear. Lactose reaches the colon and is fermented.

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