Question

Lily visits her family doctor because she experiences an upset stomach after drinking milk. The doctor tells her that this symptom is caused by a lack of the enzyme lactase. Lactase breaks down lactose, the sugar in milk which is made of several parts. What does lactose break down into?

Answer 1

Normally when a person eats something containing lactose, an enzyme in the small intestine called lactase breaks it down into simpler sugar forms called glucose and galactose. These simple sugars are then easily absorbed into the bloodstream and turned into energy — fuel for our bodies.

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