Leaves and roots. Often its aerial parts are sold; aerial parts and roots are mixed, inflorescence free.
The root is traditionally considered choleretic (activates bile production) and cholagogue (facilitates the expulsion of retained bile in the gallbladder).
The leaves are popularly used as a diuretic, for removing liquids.
Popularly, the whole plant is considered a purifying and mild laxative used in the treatment of eczema and other skin disorders, gout and rheumatic disorders.
The European Medicine Agency (EMA) approved the traditional use of the leaf and root with aerial parts to enable the removal of liquids. In addition, it approves the traditional use of the root with aerial parts, for the relief of mild digestive disorders such as bloating, flatulence and slow digestion.
It is also indicated as a stimulant of liver functions.