The standardized extract contains flavonolignans, collectively referred to as silymarin. Sometimes the extract itself is called “silymarin”, which can lead to confusion over dosage since the level of flavonolignans (silymarin) in the extract is typically 60 to 80%, depending on the test methodology used. The main flavonolignans found in the extract are silybin (silibin), silychristin, silydiani...