Ursodeoxycholic acid is a bile acid, a substance naturally produced by the body that is stored in the gallbladder. It works by decreasing the production of cholesterol and by dissolving the cholesterol in bile so that it cannot form stones..
Silymarin is an active principle obtained from milk thistle seed (Silybum marianum) . It might protect liver cells from toxic chemicals and drugs. It also seems to have antioxidant and anti-inflammatory effects. Milk thistle plant extract might enhance the effects of estrogen..