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The Vitamin A and Vitamin C Content of Sows' Colostrum and Milk

University of Wisconsin^,2

Abstract

Conclusions:

1. The vitamin A and vitamin C levels of colostrum and normal milk are reported for ten sows carried through growth and gestation on pasture and for ten sows carried through growth and gestation in dry-lot.
   
2. The sows were milked manually after the injection of 1 ml. of Pitocin, on the first day of lactation, the third day, the first, week, and each subsequent week until weaning at eight weeks of age.
   
3. The mean values for vitamin A are: first and third day colostrum from pasture sows 143.6 /100 ml., from dry-lot sows 132.9 /100 ml.; normal milk from pasture sows 52.7 /100 ml., from dry-lot sows 34.8 /100 ml. of milk.
   
4. The mean values for vitamin C are: first day colostrum from pasture sows 18.8 mg./100 ml., from dry-lot sows 24.6 mg./100 ml.; normal milk from pasture sows 10.4 mg./100 ml., from dry-lot sows 12.2 mg./100 ml. of milk.
   

¹ The authors wish to acknowledge the assistance of Li-min Wu in the vitamin A determinations.

² From the Animal Husbandry and Biochemistry Departments. Approved for publication by the Director of the Wisconsin Agricultural Experiment Station.