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Some Unique Properties of Lactose as a Dietary Carbohydrate

Kraft Foods Company, Chicago, Illinois

ABSTRACT

A certain inadequacy of lactose as the sole carbohydrate in the diet of rats has been reported by Ershoff and Deuel (7), who also refer to previous reports on this subject. On the other hand, the complete adequacy of lactose as the only carbohydrate in the diet of rats is demonstrated by their growth and survival on a diet of whole milk supplemented by iron, copper, and manganese to prevent the development of dietary anemia.

The adequacy or inadequacy of lactose as a carbohydrate evidently depends upon the amount of lactose ingested or upon the proportion of the total calories of the diet supplied by lactose. The violent reactions of rats to diets containing large amounts of lactose indicate a very great deviation in physiological action of lactose from that of the other usual food carbohydrates.

The laxative action of considerable amounts of lactose in the diets of both mammals and birds is well known.