Journal of Nutrition

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Journal of Nutrition Vol. 43 No. 2 February 1951, pp. 245-260
Copyright © 1951 by American Society for Nutrition
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Effects of Different Amounts of Lutein, Squalene, Phytol and Related Substances on the Utilization of Carotene and Vitamin a for Storage and Growth in the Rat1

One Figure

Edward G. High2 and Harry G. Day

Department of Chemistry, Indiana University, Bloomington

Vitamin A-depleted weanling rats were fed different levels of ß-carotene. The addition of small amounts of lutein increased the quantity of vitamin A stored in the livers and kidneys but large amounts decreased the storage. Also, large amounts of squalene, phytol and {alpha}-tocopheryl acetate decreased the storage of vitamin A. Relatively small amounts of {alpha}-ionone, ß-ionone, and hydroquinone had no effect.

The storage of vitamin A given to vitamin A-depleted rats was not affected by large supplements of squalene or phytol.

The rate of loss of vitamin A from the livers and kidneys of rats was not affected by any of the following supplements: squalene, phytol, geraniol, menthol, or by repeated anesthesia with ethyl ether.

The sex difference in the utilization of carotene and vitamin A for storage of vitamin A in growing rats is due, in large part at least, to the differences in rate of growth.

1 Supported in part by grants from the Nutrition Foundation, Inc., and the Research Funds of the Graduate School of Indiana University. Some of the data are taken from a thesis submitted by Edward G. High to the Faculty of the Graduate School in partial fulfillment of the requirements for the Ph.D. degree, December, 1949.

Presented in part at the meetings of the American Chemical Society in Houston, March, 1950.

Contribution no. 510 from the Department of Chemistry, Indiana University, Bloomington.

2 National Institutes of Health Predoctorate Research Fellow, United States Public Health Service. Present address: Prairie View Agricultural and Mechanical College, Prairie View, Texas.

Manuscript received 30 September 1950.




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