Silybum marianum, commonly known as milk thistle, is a plant species that has been used for centuries for medicinal purposes. The plant's active ingredient is silymarin, which is known for its hepatoprotective properties. Other synonyms for the milk thistle include Holy Thistle, Lady's Thistle, and St. Mary's Thistle. Other names used for its seeds and fruits include Marian Thistle, Mediterranean Milk Thistle, and Scotch Thistle. Milk thistle can be used to treat liver-related conditions such as cirrhosis, hepatitis, and liver damage due to chemicals or toxins. Its antioxidant and anti-inflammatory properties also make it beneficial in treating many other ailments such as high cholesterol, diabetes, and cancer.