Nature’s Way Milk Thistle Standardized Description: Milk Thistle extract is standardized to 80% silymarin. Silymarin is the key constituent that exerts a protective effect against substances potentially harmful to the liver. Nature’s Way Standardized Milk Thistle extract is a technically advanced herbal product. Standardization assures specific measurable levels of important compounds that provide beneficial activity in the body. Disclaimer These statements have not been evaluated by the FDA. These products are not intended to diagnose, treat, cure, or prevent any disease.