Journal of Nutrition

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Journal of Nutrition Vol. 89 No. 4 August 1966, pp. 495-500
Copyright © 1966 by American Society for Nutrition
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A Salt Mixture Supplying the National Research Council Estimates of the Mineral Requirements of the Rat1

F. W. Bernhart and R. M. Tomarelli

Research Division, Wyeth Laboratories, Radnor, Pennsylvania

In view of the criticisms of the compositions of the salt mixtures commonly used in rat diets, growth studies were carried out with a mineral mixture based on the requirements listed by the National Research Council (NRC). Addition of sulfate to this mixture improved growth and the protein efficiency ratio. All mineral requirements estimated by the NRC were adequate for maximal growth of male weanling rats. A close correlation was noted between estimated mineral requirements and amounts present in fat-free tissues of adult rats.

1 A preliminary report of these observations was presented before the 49th Annual Meeting of the Federation of American Societies for Experimental Biology 1965 Federation Proc., 24: 373 (abstract).

Manuscript received 15 March 1966.




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