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Journal of Nutrition Vol. 35 No. 2 February 1948, pp. 281-286
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Self Selection of Diet

VII. The Effect of Age and Pregnancy on Selection1

E. M. Scott, Sarah Jane Smith and Ethel L. Verney

Department of Chemistry, University of Pittsburgh, Pittsburgh, Pa.

Only 9 out of 31 animals 21 days old selected casein and exhibited some growth when offered a choice of that protein, sucrose, hydrogenated vegetable oil, and salts. The other 22 died at an average age of 58 days. About 60% of either 6-week old or 12-week old animals selected casein and gained weight. Younger animals showed more preference for fat and less preference for sucrose than older rats. During pregnancy, the intake of salts increased.

1 Contribution no. 656 of the Department of Chemistry, University of Pittsburgh. Aided by grants of the Nutrition Foundation, Inc., and the Buhl Foundation.

Manuscript received 20 October 1947.




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