The myth part is that it is common just in Europeans or "caucasian" race. Lactase persistence is relatively common in many parts of the world. Indians have some

The myth part is that it is common just in Europeans or "caucasian" race. Lactase persistence is relatively common in many parts of the world. Indians have some percentage, Semites and more. It was unheard of in native Americans and Canadians, and very rare in eastern Asians. I have no idea about prevalence in Africa, must be nonzero.