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Lactose intolerance is actually the human norm – but racism, the US government and business interests have made it into a condition

Researchers and dairy producers helped frame lactose digestion as abnormal, even though nearly two-thirds of people worldwide are lactose intolerant, the article says.

  • In the 1960s, American dairy producers and scientists framed lactose intolerance as an "inborn error of metabolism" to address postwar milk surpluses, though experts later recognized it as a normal physiological state.
  • During the 20th century, nutritional imperialism promoted milk-rich, Western diets as superior; in 1959, Japan's nutrition bureau declared "rice-eating peoples" were "resigned and passive."
  • A 1966 study in Baltimore mislabeled digestive differences in Black prisoners as genetic mutations; by 1981, a National Institutes of Health official clarified that lactose intolerance is "a normal physiological condition."
  • White supremacists have embraced lactose tolerance as a "distinguishing debility" of nonwhite people, using maps from the journal Nature to reinforce racial hierarchies on social media.
  • The Chinese Nutrition Society featured milk in its 2022 Food Guide Plate, ignoring evidence that the vast majority of Han Chinese are lactose intolerant and perpetuating Western dietary norms.
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Lactose intolerance is actually the human norm – but racism, the US government and business interests have made it into a condition

The majority of the world is unable to process the lactose in milk without uncomfortable symptoms Olga Miltsova/iStock via Getty Images PlusLactose intolerance makes drinking milk or eating ice cream a literal pain. For some people, eating a dairy treat can lead to bloating, nausea and diarrhea. You might’ve experienced its effects yourself. If so, you may think of lactose intolerance as a defect rather than the norm. But did you know that most …

·Boston, United States
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The Conversation broke the news in Boston, United States on Tuesday, August 25, 2026.
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