Milk thistle (silymarin) is used as a natural treatment for liver problems. These liver problems include cirrhosis, jaundice, hepatitis, and gallbladder disorders. Silymarin is the main active ingredient in milk thistle. Silymarin is both an anti-inflammatory and antioxidant. Milk thistle may aid people with alcohol-related liver disease. It may also positively benefit for people whose liver is damaged by industrial toxins, such as toluene and xylene.