Geranium sanguineum is a herbaceous perennial plant from the Geraniaceae family, with well developed roots. Freshly cut, the roots are pink while after several minutes, they become red. After washing, the roots are dried on air or in dryers at a temperature of 40-45oC. The dried roots are red-brown on the outside and with red tinge on the inside. The plant contains flavonoids, catechin tannins, polyphenol acids, condensed tannins, sesquiterpene lactones and others.