Silymarin is a purified extract from milk thistle (Silybum marianun (L.) Gaertn), composed of a mixture of isomeric flavonolignans: silybin (its main, active component), isosilybin, silydianin and silychristin. This extract has been empirically used as a remedy for almost 2000 years, and remains being used as a medicine for many types of acute and chronic liver diseases. Despite its routinely clinical use as hepatoprotectant, the mechanisms underlying its beneficial effects remain largely unknown. The purpose of this study was to investigate the pharmacokinetics and bioaequivalence of two...