The emergence of the capacity to digest milk in some populations represents a landmark in human evolution. linking genetic change with a component of niche construction. namely dairying. Alleles promoting continued activity of the enzyme lactase through the life-course (lactase persistence) evolved in several global regions within the last 7. https://www.aitsglobal.com/product-category/%d7%aa%d7%9b%d7%a9%d7%99%d7%98%d7%99%d7%9d/