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Nutritive Differences in Rations Containing Unhydrogenated or Hydrogenated Fats as Shown by Rearing Successive Generations of Rats

Procter and Gamble Company, Ivorydale, Ohio

Rats were fed the ordinary sterility ration composed of casein, dextrin, lard, cod liver oil, salt mixture and dried yeast supplemented, in some cases, with wheat embryo and, in other experiments, with small quantities of milk and fresh liver.

In these experiments nutrition was not improved by replacing the lard with unhydrogenated soybean oil. However, when partially hydrogenated soybean oil or partially hydrogenated cottonseed oil replaced the lard, there was a decided improvement in relation to the number of young which were born, the number of young which were weaned, and the breeding of successive generations of rats.

Hydrogenation does not destroy the vitamin E present in vegetable oils. Under conditions where oxidation may cause destruction of essential factors in the diet, use of hydrogenated oil is preferable to the use of unhydrogenated vegetable or animal fats.