Where Is Lactase Persistence?

Lactase persistence is common among the indigenous populations of northern Europe and parts of Africa and the Middle East.

A heat map of the globe labeled Lactase Persistence Genotype Frequency. A legend indicates that red is high and blue is low. Central and South America, Asia and southern Africa are blue. Europe, western Africa and the Middle East are orange and red.
Lactase Persistence Genotype Frequency

Global Distribution of Lactose Tolerance

Dr. Sarah Tishkoff