Doctor’s Best Saw Palmetto Extract provides effective prostate support. It contains pure Saw palmetto extract guaranteed to supply 85% to 95% fatty acids and beneficial plant sterols, which are the herb's key active ingredients. Extraction is done using super-critical carbon dioxide, the finished product is free of solvent residues. How does it work? Saw palmetto extract is one of the world's leading herbal products for prostate support. Saw palmetto's active ingredients help to enhance prostate gland structure, as shown in clinical studies where saw palmetto extract promoted healthy urinary functions and prostate structure. Saw palmetto’s effectiveness comes from its natural fatty acids and sterols. These include oleic acid, lauric acid, campasterol, stigmasterol, beta-sitosterol and others. The standard of quality for Doctor’s Best Saw Palmetto Extract is a high concentration of fatty acids and sterols, equaling up to 95%.