Lactose Intolerance occurs in the digestive system.

A gastroenterologist treats lactose intolerance and ulcers.

Galactose is involved with lactose intolerance, but is not responsible for lactose intolerance. The enzyme that is missing or is not found in great enough quantities in the body, lactase, is responsible for not breaking down lactose. This is how the intolerance comes about. The body cannot properly break down lactose without the enzyme lactase present.

Lactose intolerance occurs when the digestive system is no longer able to metabolise the sugars (lactose) found in dairy products through producing insufficient amounts of an enzyme called lactase.

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