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June 15, 1935

Current Comment

JAMA. 1935;104(24):2190-2191. doi:10.1001/jama.1935.02760240050018

VITAMIN D CONTENT OF CERTAIN MAMMALIAN LIVERS  Little information has heretofore been available on the vitamin D content of mammalian livers. Devaney and Munsell1 have recently tested this factor in calf, beef, lamb and hog livers. The line test in rats from 4 to 5 weeks old was used in making the assays. At the end of the three weeks dietary depletion period several individuals of each litter were fed liver. At least one animal was given 0.2 unit of the international standard vitamin D, and one was usually continued on the basal diet alone. Allowance was made for the phosphorus in the liver feedings by adding extra calcium in the form of calcium carbonate to the Steenbock diet in amounts large enough to maintain the calcium: phosphorus ratio of the whole diet equal to that of the rachitic diet alone. The vitamin D potency of each type of