Word: vitamine
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Dates: during 1923-1923
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...hitherto unknown dietary factor essential for reproduction in rats has been discovered by Dr. Herbert M. Evans and Dr. Katharine S. Bishop, of the University of California.* They call it ";Vitamin X." "Vitamins," now so popular, were unknown ten years ago. They have not been isolated. They cannot be seen or weighed. They came to light only when it was found that diets apparently perfectly balanced according to pre-existent information did not provide proper nourishment in some cases arid even brought on certain "; deficiency "; diseases (e. g., scurvy, beriberi, pellagra). There are three major vitamins (Fat-soluble A, Water...
When female rats were raised (by Doctors Evans and Bishop) on a standard synthetic diet used in animal laboratories, containing vitamins A and B, they became fat, sleek and healthy, but practically all of them were sterile. When fresh green lettuce leaves were added to their menu, the sterile rats produced litters. Drs. Evans and Bishop found this X-substance also in the whole-wheat grain, egg yolk, beef liver and some other foods, but not in milk, the otherwise perfect food. The absence of Vitamin X affects the reproductive powers of the male, as well as the female...
Whether the data on Vitamin X can be applied to other animals, including humans, has not yet been determined. But it can be said, at least, that much of our present-day knowledge of human nutrition and physiology was first learned through experiments on rats...
...detection of Vitamin...
Among the distinguished medical men on the program were Friedrich Wenckebach, Viennese heart specialist; F. G. Banting, of insulin fame; E. V. McCollum, vitamin expert of Johns Hopkins; A. B. Luckhardt, Chicago physiologist; Walter Timme, neuroendocrinologist of New York; Fred H. Albee, surgeon. The business of the Association was transacted by the House of Delegates, which has representatives by population from the affiliated medical societies of each state. The A. M. A. is widely known as a model of efficient administration under the direction of Dr. George H. Simmons, whose headquarters are in Chicago. With 88,000 members-the majority...