Evolution

Food
12:59 pm
Fri December 28, 2012

An Evolutionary Whodunit: How Did Humans Develop Lactose Tolerance?

Thousands of years ago, a mutation in the human genome allowed many adults to digest lactose and drink milk.
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Originally published on Fri December 28, 2012 9:41 am

Got milk? Ancient European farmers who made cheese thousands of years ago certainly had it. But at that time, they lacked a genetic mutation that would have allowed them to digest raw milk's dominant sugar, lactose, after childhood.

Today, however, 35 percent of the global population — mostly people with European ancestry — can digest lactose in adulthood without a hitch.

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