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Prehistoric People Drank Animal Milk, Despite Lactose Intolerance

Researchers have long suspected that humans evolved to tolerate dairy products in order to reap their health benefits. Now a new study refutes that idea.

Around one-third of the world's population possesses a gut enzyme that allows them to digest lactose, a sugar in milk. Those lucky individuals -- mostly of European heritage -- can feast on dairy products without suffering digestive woes...