Experiments have been conducted to determine if protein, minerals and vitamin A are of equal importance for prolongation of life. One group of rats was fed on white corn alone. White corn is known to be deficient in protein, vitamin A and minerals. Rats on the above diet lived an average of 72 days. A second group of rats received a diet consisting of white corn 88 per cent together with casein 12 per cent. They lived an average of 75 days. A third group of rats received white corn 98 per cent, and 5 per cent of salt mixture. They lived an average of 87 days. The fourth group of rats received white corn 95 per cent and 5 per cent of butter fat. All are alive at the end of 160 days. None of the animals grew. Distilled water was furnished ad. lib. to all of the animals.
Proceedings of the Iowa Academy of Science
©1925 Iowa Academy of Science, Inc.
Hansbrough, J. H.; Nelson, V. E.; and Fulmer, E. I.
"Vitamin A and Longevity,"
Proceedings of the Iowa Academy of Science, 32(1), 442-442.
Available at: https://scholarworks.uni.edu/pias/vol32/iss1/116