Vitamin A was discovered
In 1913, Elmer McCollum and Marguerite Davis at the University of Wisconsin-Madison discovered a ‘fat-soluble’ accessory food substance, now known as vitamin A, effective against xeroph-thalmia.
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Source: Hans Huber Publishers
Credit: PDF: The Discovery of the Vitamins, 2012. Photo: Elmer McCollum courtesy University of Wisconsin, Madison Archives.
