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Journal of Nutrition Vol. 34 No. 4 October 1947, pp. 351-362
Copyright © 1947 by American Society for Nutrition
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The Quality of the Diet and the Consumption of Sucrose Solutions1

C. M. McCay and Eva M. Eaton

Animal Nutrition Laboratory, Cornell University, Ithaca, New York

Rats fed an adequate stock diet drink about 12 ml of water or 24 ml of 10% sucrose solution per day per 100 gm of live weight. The water consumption of growing rats in relation to body weight declines progressively as the rats mature, while the sugar solution drunk is relatively constant.

No evidence has been found that rats tire of a sugar solution. Diets rich in sugar or starch produce no decrease in the drinking of sucrose solutions unless the high carbohydrate dilutes essential nutrients to a low level.

When fed diets low in calcium rats refuse to consume cola beverage or sucrose solution except in amounts to provide water. Under such conditions the amount of sucrose solution drunk is lower than normal water consumption.

When an adequate stock diet was diluted with 3 parts of corn starch, the amount of sucrose solution consumed was observed to depend upon supplementing the diet with calcium in the case of adult rats; in the case of growing rats, a high level of sucrose solution was drunk only when the diet was supplemented with protein, vitamin A and calcium.

An adult rat drinking daily 72 ml of sucrose solution excreted 43 ml of urine in contrast to a rat drinking 40 ml of water and excreting 15 ml of urine.

Rats lactating heavily drank 69–71 ml of sucrose solution and 17–24 ml of water.

Exploratory studies indicate that the rat's ability to detect certain dietary deficiencies may decrease with advancing age.

1 These experiments were started at the Naval Medical Research Institute, Bethesda, Maryland, and concluded in the Animal Nutrition Laboratory, Cornell University, Ithaca, New York. Assistance in the earlier studies was given by June Sullivan and R. A. Gortner, Jr. This research was financed in part by a grant from the Office of Naval Research to determine factors responsible for the deterioration of gums, teeth and vestment tissues.

Manuscript received 16 June 1947.




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