The Effect of Coffee, Human Diets, and Inheritance upon the Life Span of Rats

Abstract
To determine the effect of diet and of coffee upon the life span of white rats, the laboratory animal most similar to man in nutritional habits, miss sperling, Dr. Loosli, Dr. Barnes, and dr. Mccay followed the life span of groups of rats fed upon (1) a diet equivalent to that consumed by many people, (2) that same diet “improved” by the addition of whole wheat bread and certain meats and vegetables, and (3) the first diet supplemented with vitamins. Coffee was given to half of each dietary group, water to the other half. Neither diet nor coffee had much effect on the life span, but the heredity of the rats had a definite effect.

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