The main ingredient, Chinese rhubarb, has been used by Cappelletti for over a century to produce bitters and aperitifs due to its particular medicinal properties. Originally from Asia, especially China, it is now cultivated all over the world. It is a perennial plant 1-2 meters high and has large, palmate leaves. The root, which has a characteristic bitter flavour, is mainly used. The root has digestive, laxative and purgative action.