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The Pantothenic Acid, Niacin, and Biotin Content of Commercial and Experimental Milks^*

Department of Biochemistry, College of Agriculture, University of Wisconsin, Madison

ABSTRACT

The pantothenic acid content of commercial market and Guernsey milks for the year 1942–43 averaged 3.4 and 3.2 µg. per ml., respectively. Analyses of 29 samples of commercial milk the preceding year averaged 4.2 µg. per ml. The niacin content of commercial mil averaged 0.80 µg. per ml. Seasonal and feeding changes did not affect the amount of these two vitamins.

Milks analyzed for biotin were found to contain from 17 to 62 mµg. biotin per ml. The average values for market and Guernsey milks were 29 and 27 mµg. per ml., respectively. The biotin content of milk showed seasonal variations which were the result of feeding changes. The type of roughage fed influenced the biotin content of milk.

^* Published with the approval of the Director of the Wisconsin Agricultural Experiment Station.