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Paul Gyorgy was a Hungarian-American pediatrician who helped discover three vitamins–riboflavin (B-2), pyridoxine (B-6), and biotin–while working in Heidelberg, Germany, Cambridge, England, and Western Reserve University in Cleveland, Ohio.

At the University of Pennsylvania, Gyorgy studied the microflora of breast-fed infants and was an ardent proponent of the superiority of breast milk for infant feeding.