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Journal of Nutrition Vol. 26 No. 1 July 1943, pp. 33-42
Copyright © 1943 by American Society for Nutrition
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The Effect of Concentration on the Absorption of Vitamin A1

A. George Reifman, Lois F. Hallman and Harry J. Deuel, Jr.

Department of Biochemistry, University of Southern California School of Medicine, Los Angeles, California

The rate of absorption of vitamin A in rats was found to be proportional to the concentration of the administered material. The average absorption per 100 sq. cm. per hour was as follows: 4.2 to 6.5 I.U. for 100 unit material, 28.5 for 1,000 unit, 369 for 10,000, 2108 for 100,000, and 10140 for 1,000,000 unit.

There is no relationship between the rate of absorption of neutral fat and vitamin A. Evidence is given which indicates that vitamin A is not destroyed by intestinal bacteria over a 3-hour period.

1 Most of these data are from a thesis to be presented by A. G. Reifman to the Graduate School of the University of Southern California in partial fulfillment of the requirements for the degree of Master of Science.

Manuscript received 11 January 1943.




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