Apparently we are one of the most lactose intolerant countries according to some data.
milk.procon.org
I have never met a lactose intolerant Somali though so that's kinda surprising to me.

Lactose Intolerance by Country - Milk - ProCon.org
Lactose intolerance is “an impaired ability to digest lactose, a sugar found in milk and other dairy products,” according to the National Institutes of Health (NIH). Lactose intolerance in infants is caused by a mutation in the LCT gene, which results in a life-long intolerance. This condition...

I have never met a lactose intolerant Somali though so that's kinda surprising to me.