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The Comparative Nutritive Value of Butter Fat and Certain Vegetable Oils^*

Department of Biochemistry, College of Agriculture, University of Wisconsin, Madison

ABSTRACT

Conclusions

Good growth was obtained in rats on a diet of four per cent butter fat, corn oil, coconut oil, cottonseed oil, or soybean oil homogenized into mineralized skimmed milk. Sufficient quantities of all known vitamins were supplied to each diet. However, rats on. butter fat made better and more efficient gains during the first two or three weeks on the experiment than rats on the vegetable oils homogenized into skimmed milk. This growth-stimulating property of butter fat appeared to lie in the saponifiable fraction since feeding the non-saponifiable fraction along with corn oil or coconut oil did not give the same response as was obtained with butter fat. Eats raised on butter fat milk had a much better appearing coat of hair throughout the experiment than the rats raised on the vegetable oil milks.

It appears that the kind of fat in the diet is important in the nutrition of the young growing animal.

^* Published with the approval of the Director of the Wisconsin Agricultural Experiment Station. Supported in part by grants from the Research Fund of the University and the Works Progress Administration.

We are particularly grateful to Dr. R. T. Major (Merck and Company) for the pure natural -tocopherol.

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