Distribution of the Bound Form of Nicotinic Acid in Natural Materials

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Abstract
The relative distribution of bound nicotinic acid, nicotinic acid and nicotinamide in a number of natural products has been surveyed microbiologically using Leuconostoc mesenteroides A.T.C.C. no. 9135 as the test organism. It appears from the results that most of the nicotinic acid in cereals and about 40% of the total nicotinic acid in oilseeds is present in bound form. Pulses do not contain any bound nicotinic acid, but contain only nicotinic acid and nicotinamide. Yeast, crustacea, fish, animal tissues and milk contain their nicotinic acid partly in the free form and mostly as the amide and they are devoid of any bound nicotinic acid.