3 ms·
Lactose intolerance is the norm. Tolerance is unusual in adult mammals. In humans, it appears to be a very recent mutation, probably associated with the domes
by mr_toad 7y ago
Lactose intolerance is the norm. Tolerance is unusual in adult mammals.
In humans, it appears to be a very recent mutation, probably associated with the domestication of livestock.
https://en.wikipedia.org/wiki/Lactase_persistence https://en.wikipedia.org/wiki/Lactase_persistence