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Vitamin A, Vitamin C and Niacin Levels in the Blood of Swine¹

University of Wisconsin²

Abstract

1. Pigs are born with a relatively high plasma vitamin C level (.96 mg./100 cc.) as compared to that of calves and lambs.
   
2. Pigs are born with a relatively low plasma vitamin A level (.1 /1 cc.)
   
3. Both vitamin A and C concentrations increase after birth with a much sharper rise in C than A.
   
4. After the first week there is a general decline in the plasma A and C levels until the sixth week. This decline is followed by a rise until the time of weaning, when a more drastic drop occurs.
   
5. Niacin values show less fluctuation than do vitamins A and C. There is a gradual decline in the niacin level from birth until after weaning.
   
6. Vitamin A and C values for mature pregnant sows are quite different from those of newborn pigs, but similar to those of weanling pigs.
   
7. There is no measurable amount of carotene in swine blood.
   

¹ Published with the approval of the Director of the Wisconsin Agricultural Experiment Station, Madison, Wisconsin. The work was supported in part by a grant from Oscar Mayer & Co., Madison, Wisconsin and Chicago, Illinois.

² Departments of Animal Husbandry and Biochemistry.