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The Effect of Feeding Certain Synthetic Vitamins of the B Complex on their Content in Milk and Urine

Department of Biochemistry and Nutrition and Department of Dairy Husbandry, Agricultural and Mechanical College of Texas, College Station

ABSTRACT

1. Synthetic thiamin, riboflavin, nicotinic acid, and pantothenic acid fed at a 2-g. level daily to dairy cows resulted in no significant increase in the levels in the milk.
   
2. There appeared to be a distinct breed difference in the cows in amount of these B vitamins in the milk on a unit basis, the Jersey being higher than the Holstein in micrograms per milliliter, while the Holstein was higher in total amount secreted daily, based on total milk production.
   
3. In the ease of the goats a significant increase of each of the vitamins occurred after they had been fed at the 2-g. level; partial destruction was indicated, since the per cent recovered in the milk and urine was 10 per cent less of the amount ingested.