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7000 BCE
Farmers domesticate corn in the Rio Balsas region of present-day Mexico
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1000 BCE
Masa produced by nixtamalization increases nutritional value of corn
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1500
Spanish explorers take corn to Europe
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European Settlers arrive and are taught to nixtamalize corn by Native Americans
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Pellagra occurs across southern Europe
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Gaspar Casal diagnoses pellagra in Spain
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John Beall patents the Beall Degerminator
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Joseph Goldberger proposes pellagra is not infections but is a disease based on an insufficient diet
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In an experiment at a prison in Mississippi, Goldberger induces pellagra in prisoners by restricting their diet
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Goldberger and his colleagues conduct "filth parties" in an attempt to 'catch' pellagra
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Cotton prices fall and pellagra rates rise. Southern Leaders insist that famine and plague does not exist in the South
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Pellagra epidemic ends after niacin is added to bread and flour (including cornmeal)