Milk thistle, a common herb native to the Mediterranean, has been widely used for its nutritional support of liver function for over 2,000 years. Seeds of the dried milk thistle flower are rich in silymarin, a bioflavonoid complex of three flavonolignins: silybin, silydianin, and silychristin. Silymarin is responsible for milk thistle’s powerful protective and regenerative activities in the liver. The liver is the body’s detoxifying organ, disabling toxins such as ethanol, environmental poisons, pesticides, and certain pharmaceuticals.