After childhood, about two-thirds of the world's human population loses the ability to digest milk. As far as we know, 100 percent of nonhuman mammals also lose this ability after weaning. The ongoing ability to digest lactose, the main sugar in milk, into adulthood is a biological abnormality.
Lactose Intolerance Is Mostly Due to Your Genes
Your Microbiome and Lactose Intolerance
Written by Patricia L. Foster for The Conversation May 16, 2019
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