Tag: Mcm6 gene

While nearly 65% of the world's adult population experiences a reduced ability to digest lactose, a significant minority retains this capacity throughout life. The answer to why do some adults have the ability to digest dairy lies in a fascinating story of human evolution, genetic mutations, and the ancient practice of dairying.

Approximately 65% of the world's adult population has a reduced ability to digest lactose, confirming that most humans lack lactase persistence. This ability to continue producing lactase after infancy is a relatively recent genetic adaptation, not the default human condition.

While approximately 65% of the world's population is lactose intolerant, a smaller percentage of Caucasian individuals retain the ability to digest milk into adulthood. This difference is not a biological rule, but a fascinating case of recent human evolution that explains **Why are Caucasians not lactose intolerant?**