The majority of the world's people become lactose -intolerant as they mature into adulthood. The exc... ...e lactase, the enzyme that digests the milk sugar lactose . But why did the mutation become so prevalent in... ...any, it'll still be milk," says Thomas. A healthy lactose...http://www.neatorama.com/2012/12/30/How-Did-Humans-Develop-Lactose-Tolerance/
How Did Humans Develop Lactose Tolerance?
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