Word: yolks
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Dates: during 1923-1923
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...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 rat. This vitamin can be extracted from the wheat embryo with ethyl alcohol and ether and a daily dose...