Standardized Extract, Milk Thistle seed (Silybum marianum) has a long history of use. Although commonly referred to as a "seed", the plant part used is actually the "fruit". Recent studies have demonstrated the positive role of Milk Thistle extract and more specifically, one of its main active constituents, silymarin, in supporting and protecting the liver.Standardized extracts are guaranteed to contain a specific quantity of a known marker compound, and are laboratory tested to insure consistent potency. NATURE"S ANSWER capsules feature a standardized extracts enhanced (Holistically Balanced) with the highest quality of organic, responsibly wildcrafted or cultivated herbs, which maintain the naturally-occurring constituents found in the plant; Manufactured to cGMP (current Good Manufacturing Practices) standards; Free of synthetic ingredients.