This is the map that was making the round in the 2000s. It's been proven completely wrong but people still post it. It's still up on wikipedia which is just more evidence the website is a eurocirclejerk: https://upload.wikimedia.org/wikipedia/commons/2/27/Worldwide_prevalence_of_lactose_intolerance_in_recent_populations.jpg
This is a more recent map, which is more accurate but still has problems. Note both the huge amount of samples in Europe, and the almost total exclusion of known Lactose Intolerant European areas (Balkans, Ukraine, Russia, etc): https://upload.wikimedia.org/wikipedia/commons/f/ff/Lactose_tolerance_in_the_Old_World.svg
It is also worth noting that the medical lactose tolerance test is done with a quarter gallon's worth of lactose. So if you're "lactose intolerant" you can still drink milk, just not a quarter gallon in one sitting. This is why Greeks and Koreans aren't exploding.
81% of Japanese are lactose TOLERANT when given a cup of milk: https://pubmed.ncbi.nlm.nih.gov/1234085/
This is the map that was making the round in the 2000s. It's been proven completely wrong but people still post it. It's still up on wikipedia which is just more evidence the website is a eurocirclejerk: https://upload.wikimedia.org/wikipedia/commons/2/27/Worldwide_prevalence_of_lactose_intolerance_in_recent_populations.jpg
This is a more recent map, which is more accurate but still has problems. Note both the huge amount of samples in Europe, and the almost total exclusion of known Lactose Intolerant European areas (Balkans, Ukraine, Russia, etc): https://upload.wikimedia.org/wikipedia/commons/f/ff/Lactose_tolerance_in_the_Old_World.svg
It is also worth noting that the medical lactose tolerance test is done with a quarter gallon's worth of lactose. So if you're "lactose intolerant" you can still drink milk, just not a quarter gallon in one sitting. This is why Greeks and Koreans aren't exploding.
81% of Japanese are lactose TOLERANT when given a cup of milk: https://pubmed.ncbi.nlm.nih.gov/1234085/