Approximately 75% of adults worldwide are lactose intolerant and those with the highest intolerance are native Americans and Asians and only slightly lower than these are the blacks, Jews, Hispanics, and southern Europeans. Lactose intolerance is lowest among northern Europeans and their descendants. In the US some 25% of Caucasians, 51% of Hispanics and 75% of all African Americans have insufficient levels of lactase to digest dairy products and 90% of Asian Americans are lactose intolerant.
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