Tekkadan on Nostr: Roughly two-thirds of adults worldwide have some degree of lactose malabsorption, but ...

Roughly two-thirds of adults worldwide have some degree of lactose malabsorption, but substantially fewer necessarily experience symptoms when consuming dairy.

There's also an evolutionary reason for this: being able to digest milk as an adult is actually the unusual trait globally. Humans generally produce lots of lactase during infancy and then reduce production after weaning.