Lactose Intolerance

In many humans the enzyme lactase, which digests the milk sugar lactose to galactose and glucose, disappears from the intestinal mucosal cells after age 4 to 6, when milk drinking usually decreases. This causes lactose intolerance, a condition in which ingestion of milk or lactose-containing milk products causes intestinal distress, because of bacterial action on the lactose that accumulates.

See also: Galactose, Glucose

INTERNET LINK: Lactose.Net - Lactose Intolerance Resources