Self Selection of Diet

Abstract
Hydrogenated vegetable oil was more generally liked by young rats than butterfat or corn or cottonseed oils. When an unpopular fat was given as a choice, the rats selected much more casein and sucrose than when the choice was hydrogenated fat. It was concluded that choice of foods when components of a diet were offered was not related to the nutritional nature of the choices (i.e., whether a given choice was fat, carbohydrate, or protein), but was more probably dependent on the animals' subjective response to each particular choice.

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