I saw this interesting table of lactose intolerance, and I remember how many years ago American food aid to Africa caused much mortality in children as the aid was based -with good intentions-for a great deal on mil products. They know better now!

As I worked in Suriname I was early aware of this problem.

Estimated Percentage of Lactose Intolerance in Different Populations(7)
Vietnamese 100%
American Indian 95%
Southern Italian 72%
African American 65%
Northern Italian 50%
French 32%
White Americans 22%
Austrian 20%
Northern European 7%
Dutch 0%

Boice, Judith. The Green Medicine Chest: Healthy Treasures for the Whole Family (p. 219). Morgan James Publishing. Kindle Edition.

Boice, Judith. The Green Medicine Chest: Healthy Treasures for the Whole Family (p. 219). Morgan James Publishing. Kindle Edition.