1936年Szent-Gyorgyi从柠檬中发现了维生素P,认为它能维持血管的正常透过性,并名之为柠檬素(citrin)。其後知道了柠檬素并非单一物质,而是桔皮苷(hesperidin)、聖草苷(eriodictin)、槲皮苷(quercitrin)等的混合物,其中以桔皮苷为最多,因此通常所谓维生素P即指桔皮苷而言。1944年Griffith发现了芸 In 1936 Szent-Gyorgyi discovered vitamin P from lemons, arguing that it maintains the normal permeability of blood vessels and is called citrin. It was later known that limonin is not a single substance but a mixture of hesperidin, eriodictin, quercitrin and the like, of which hesperidin is the most, so that the so-called vitamin P In terms of hesperidin. Griffith discovered Yun in 1944