noun[mass noun] chiefly US
The bioflavonoids, regarded collectively as a vitamin.
- The ‘bioflavonoids', or vitamin P, a complex that includes D-catechin and many other flavonoids, occur in grape juice in large amounts, especially in dark-skinned berries.
- The bioflavanoids are sometimes called flavones and are also called vitamin P because of their effect on the permeability of capillaries.
- By its support of the capillaries, vitamin P helps to prevent hemorrhage and rupture of these tiny vessels, which could lead to easy bruising.
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