"All around the world we've settled on cows, not because anybody thought cow milk was the best, but just because cows were the most economically pragmatic. Most Native Americans can't, most Africans can't, except the Maasai, interestingly, because they're cattle herders."Īnimal milk wasn't always used for human consumption and cows haven't always been the animal of choice. "But there is still a large part of the world that can't drink milk. Middle Easterners and Europeans tend to be able to drink milk because they have the mutation. "It was genetic, so it goes through groups of people. The enzyme produced in the stomach to digest lactose, the sugar in milk, usually shuts off at two years old, but for some groups of the population, this enzyme stopped shutting off. Humans are not designed to drink milk past infancy, he says.
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