Vitamin P

Vitamin P
An old name for substances now known as bioflavinoids. They are no longer considered to be vitamins by the strict definition of that word.

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vitamin P n a substance or mixture of substances obtained from various plant sources, identified as any of a number of substances (as citrin or a mixture of bioflavonoids), and formerly held to be useful in reducing the extent of hemorrhage but never precisely characterized chemically or proved to have the effects claimed for it

Medical dictionary. 2011.

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