Not needed: The nordic people mastered animal husbandry and keep their lactase for the entire life. For the rest of the people , lactase is deleted at various ages since it is not an essential enzyme. In fact , human is likely the only mammal still drinking milk after infancy.
Answered 6/27/2017
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A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
A doctor has provided 1 answer
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