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November 4, 1933


JAMA. 1933;101(19):1499-1500. doi:10.1001/jama.1933.02740440059030

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To the Editor:  —I chanced to read the report by your Berlin correspondent entitled "Research on Vitamins and Hormones" (The Journal, September 9, p. 867) shortly after having consulted the original paper by Kuhn and collaborators (Ber. d. Deutsche Chem. Gesellsch.66 B, 1034). Kuhn gave evidence that the antipellagra factor is not identical with the "lyochromes" and referred to the work of P. György who designated the antipellagra factor "vitamin H."Further, since evidence has been accumulating in recent years that the vitamin B complex contains two or more factors in addition to B1, it may not be entirely correct to hold that "a further, colorless factor derived from yeast" (complementary to the lyochromes) was "previously unknown." Whether "vitamin H" is a component of this particular yeast fraction is not clear, since György's report is not yet available to me. However, Kuhn pointed out that purified "vitamin H"

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