Lactose is found in dairy products such as milk, yogurt, and cheese. It is a natural sugar exclusive to dairy. Humans are born with enzymes that aid in the digestion of lactose. However, as a person ages, the enzyme depletes. This can result in adult-onset lactose intolerance. People who are lactose intolerant can opt for dairy-free products made with soy or nut milk, or may take digestive enzymes to aid in lactose digestion.

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