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JAMA. 1934;102(22):1854-1855. doi:10.1001/jama.1934.02750220032015.
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PHARMACOPEIAL VITAMIN STANDARDIZATION  Elsewhere in this issue (Miscellany, page 1877) appears a comprehensive statement on standardization of vitamins issued by the Committee of Revision of the U. S. Pharmacopeia. The committee intends to issue interim revisions. The first of these has just been promulgated and deals with the methods and potencies of vitamin assay for cod liver oil. The new standards become official Jan. 1, 1935. It may be recalled that in the present Pharmacopeia there are two types of cod liver oil described: one that requires no assay and another that requires an assay of the vitamin A but not the vitamin D content. Even in the latter the vitamin A limits are low. For this reason the Council on Pharmacy and Chemistry has found it necessary to examine meticulously the protocols of assay of various accepted brands of cod liver oil. In each succeeding issue of New and Nonofficial Remedies it


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