Lactose Intolerance: Why Most Asian People Are ... - Science ABC

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Lactose intolerance is quite common, especially in Asian countries. The reason behind this is “gene-culture co-evolution”. Lactose intolerance is the inability to digest lactose in milk because they lack the lactase enzyme. A 1981 study found that the percentage of people with lactose intolerance changes from region to region. In East Asia, the numbers are insanely high; 90-100% of East Asians are lactose intolerant.

Do you remember the short, nerdy man from The Big Bang Theory who would blow up into a gas balloon every time he consumed cheese or ice cream? Yes, I’m talking about Leonard Hofstadter. And, the reason for his flatulence? Lactose intolerance!

WATCHING LEONARD EAT A CHEESECAKE

Lactose intolerance is quite a common affliction, especially in Asian countries. Around 90% of Asian people are lactose intolerant, but what is the reason behind this is “gene-culture co-evolution”.

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