Natrol Milk Thistle Advantage 525 mg combines the power of milk thistle, standardized to 80% silymarin, along with supportive herbs. Silymarin, a flavonoid complex extracted from milk thistle seeds, supports the health of the liver. Silymarin aids in the detoxification of the liver and elimination of metabolic by-products by helping to fortify cell membranes, provide antioxidant protection, and rejuvenate liver cells.- 420 mg of Silymarin per serving- Supports Liver Health- Promotes Liver Detoxification & Waste Elimination- Nature's Powerful Antioxidant- 100% Vegetarian