TABLE 1

Prevalence of Acquired Primary Lactase Deficiency69

Examples of groups among whom lactase deficiency predominates (60%–100% lactase deficient)
    Near East and Mediterranean: Arabs, Ashkenazi Jews, Greek Cypriots, Southern Italians
    Asia: Thais, Indonesians, Chinese, Koreans
    Africa: South Nigerians, Hausa, Bantu
    North and South America: black Americans, Latinas, Eskimos, Canadian and American Indians, Chami Indians
Examples of groups among whom lactase persistence predominates (2%–30% lactase deficient)
    Northern Europeans
    Africa: Hima, Tussi, Nomadic Fulani
    India: individuals from Punjab and New Delhi