The Composition of Swine Milk II. Thiamine, Riboflavin, Niacin and Pantothenic Acid Content

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Abstract
Colostrum and milk were obtained during two successive farrowing seasons from a total of 35 sows and gilts, and analyzed for thiamine, riboflavin, niacin and pantothenic acid. The average values from all samples of colostrum, in micrograms per milliliter, were: thiamine, 0.6; riboflavin, 5.0; niacin, 1.7; and pantothenic acid, 0.7. The average values for milk at the 5th, 15th and 55th days post partum, respectively, in micrograms per milliliter, were: thiamine, 0.6, 0.6 and 0.7; riboflavin, 2.1, 2.2 and 3.2; niacin, 4.3, 7.0 and 8.0; pantothenic acid, 1.9, 2.9 and 5.4. It was not possible to correlate the composition of colostrum or milk with respect to these vitamins and such factors as age, breed or supplementation of an all-vegetable ration with various materials presumably containing still unknown factors.