Editing Flavonoid (section)

== History ==
In the 1930s, [[Albert Szent-Györgyi]] and other scientists discovered that [[Vitamin C]] alone was not as effective at preventing [[scurvy]] as the crude yellow extract from oranges, lemons or paprika. They attributed the increased activity of this extract to the other substances in this mixture, which they referred to as "citrin" (referring to citrus) or "Vitamin P" (a reference to its effect on reducing the permeability of [[Capillary|capillaries]]). The substances in question ([[hesperidin]], [[eriodictyol]], hesperidin methyl chalcone and [[neohesperidin]]) were however later shown not to fulfil the criteria of a vitamin,<ref>{{Cite book|url=https://books.google.com/books?id=hc1TyKSumOkC&pg=PA210|title=Vitamins and Hormones|date=1949|publisher=Academic Press|isbn=978-0-08-086604-8|language=en}}</ref> so that this term is now obsolete.<ref>{{Cite book|vauthors=Clemetson AB|url=https://books.google.com/books?id=1kgPEAAAQBAJ&pg=PA101|title=Vitamin C: Volume I|date=January 10, 2018|publisher=CRC Press|isbn=978-1-351-08601-1|language=en}}</ref>