Silymarin, the main active compound in Milk Thistle, is one of the most potent liver supportive substances known. In studies Silymarin has been shown to aid glutathione production in the liver by around 30%. Glutathione is used by the body to make peroxidase one of the body's most potent free radical fighting enzymes, thus aiding detoxification significantly. Silymarin also supports protein synthesis in the liver encouraging the growth of healthy liver cells. Milk Thistle can aid bile flow an attribute that supports both liver and gall bladder.