Lactose Culture: Africans' Ability To Digest Milk Linked To Spread Of Cattle Raising

Babies are born with the ability to digest lactose, the sugar found in milk, but most humans lose this ability after infancy because of declining levels of the lactose-digesting enzyme lactase. Most mammals also do not drink milk after weaning. So did maintaining a high level of lactase confer an evolutionary advantage - reaping the nutritive benefits of milk - or is lactase persistence (lactose tolerance) simply due to dairy culture shaping? read more

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