Commonly known as St. Mary’s thistle, milk thistle is an herb that has been used as a natural remedy for centuries. Milk thistle contains a flavonoid called Silymarin, which is used to help maintain healthy liver function. In addition, Milk Thistle possesses antioxidant properties to fight cell-damaging free radicals produced in the liver and body.   Vitamin World’s Milk Thistle Standardized Extract 250mg is standardized to contain 80% Silymarin, this will give you the highest source per serving. This botanical herb is also used as a tonic for its high-antioxidant properties and many benefits that have been related to the herb such as aiding with liver health, gallbladder health, and insulin function.*