| "An estimated 65% of human adults (and most adult mammals) downregulate [decrease] the production of intestinal lactase after weaning. Lactase is necessary for the digestion of lactose, the main carbohydrate in milk, and without it, milk consumption can lead to bloating, flatulence, cramps and nausea. Continued production of lactase throughout adult life (lactase persistence, LP) is a genetically determined trait and is found at moderate to high frequencies in Europeans and some African, Middle Eastern and Southern Asian populations."
Itan Yuval, PhD A Worldwide Correlation of Lactase Persistence Phenotype and Genotypes" (5 MB)
 , BMC Evolutionary Biology, Feb. 9, 2010 | |||||||||||||||||||||||||||||||||||||||||||||
Lactose intolerance percentages were taken directly from the source referenced. The fact that some percentages are exact and others are provided as a range is the result of the research methodologies used by the authors of the respective studies. Please note that the data below references lactose intolerance only and not milk allergy. For information on the differences between Lactose Intolerance and Milk Allergy please click here.
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Thursday, 7 September 2017
Lactose Intolerance by Ethnicity and Region
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