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Utilization of Vitamin A in Different Carriers by Beef Cattle

Chas. Pfizer & Co., Inc., Terre Haute, Indiana

Abstract

1. Vitamin A depleted cattle were given orally pure synthetic vitamin A esters in the forms of aqueous dispersion, oil solution and gelatin beadlets at levels of 2800–72,000 I.U. per 100 lb. body weight. The aqueous and gelatin beadlet forms of vitamin A produced greater blood plasma vitamin A responses at 12 hours after dosing and greater average plasma responses for the entire period following dosing than did the oil solutions of vitamin A.
   
2. Oil solutions of synthetic vitamin A and natural vitamin A (fish oil) when administered in equal doses produced blood plasma responses which were not significantly different at 12 hours or for the entire period.