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Summary Vitamin D is not technically a vitamin, since it is not an essential dietary factor. It is rather a prohormone produced… Expand A rat thyroid cell line (FRTL-5) was used to study the effect of cholecalciferols on cAMP production. The active cholecalciferol… Expand The configuration at C-25 in 5 beta-cholestane-3 alpha, 7 alpha, 12 alpha,25,26-pentol isolated from the bile and feces of… Expand In a review of the literature metabolism, regulation and function of vitamin D and its active metabolites is discussed. Vitamin D… Expand