Rutin

Rutin, also known as Vitamin P, is a medical substance used in treating varicose veins and capillary weakness. Rutin is extracted from the flower buds of Sophora japonica L.--"Chinese Scholartree", which widely grows in the wild area of iinland China. Nowadays, BimSiframGroup' factory in china has become one of the leading manufacturers of rutin.
The flavonoid rutin is a flavonol glycoside comprised of the flavonol quercetin and the disaccharide rutinose. Rutin is found in many plants, especially the buckwheat plant Fagopyrum esculentum Moench, the flour of which is used to make pancakes. Other rich dietary sources of rutin include black tea and apple peels.