A Comparison of Swine Feeds as Sources of Provitamin A

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Abstract
Carotenoids in sun-cured alfalfa hay, dehydrated alfalfa meal, dehydrated alfalfa pellets, yellow corn, and crystalline carotene in cottonseed oil when fed at the rate of 25 γ/kg. body weight daily to vitamin A deficient pigs were adequate for optimum weight gains and eventual restoration of apparently normal blood plasma vitamin A levels. However, the rate of recovery of normal plasma vitamin A levels varied with the source of carotenoids. The feeds used showed the following order of effectiveness as sources of provitamin A: dehydrated alfalfa meal and pellets, crystalline carotene in cottonseed oil, sun-cured alfalfa hay and yellow corn. Copyright © . .