Prevalence, Age, Gender & Genetics: Late onset lactase
deficiency is the most common type of lactoe intolerance (LI).
It is estimated to affect around 75% of the world population.
Lactose intolerance varies from human group to another one.
Moreover, onset of lactose intolerance varies from children of a
group to another. Prevalence of Lactose Intolerance The
prevalence of primary lactose deficiency varies according to
race. In a review by Gudmand-Hoyer E in published on The
American Journal of Clinical Nutrition (1994), it is lowest in
Scandinavia and Northwest Europe (3-8%) and close to 100% in
most of Southeast Asia. In Europe the frequency increases in the
southern and eastern directions, reaching 70% in southern Italy
and Turkey. There is also a high prevalence of lactose
maldigestion in the people of Africa with the exception of
cattle-raising nomads. Moreover, studies conducted by Scrimshaw
and Murray and Sahi review the prevalence of lactose
maldigestion globally. The prevalence is above 50% in South A