Milk thistle extract for liver support * Silymarin is a milk thistle extract that nutritionally supports liver function. This highly active botanical protects the liver from free radical damage, supports glutathione concentrations and promotes superoxide dismutase activity. Milk thistle extract also stimulates protein synthesis in hepatic cells. Silymarin is a highly concentrated milk thistle extract that supports healthy liver functioning through a number of mechanisms. Ingredients:Silymarin Supplemental Facts Amount Per Serving each vegetable capsule contains: milk thistle (Silybum marianum) extract (seed) 250 mg. (standardized to contain 80% silymarin) other ingredients: vegetarian capsule (cellulose, water) 1-4 capsules per day, in divided doses, between meals.