Doctor's Best Saw Palmetto helps support healthy prostate function.* Saw Palmetto is a quality pure fruit extract that provides prostate support.* Doctor's Best Saw palmetto extract contains plant sterols, free fatty alcohols, monoglycerides and free fatty acids but the free fatty acids and sterols are the primary ingredients that provides the desired effect. Doctor's Best Saw palmetto extract is 85% to 95% fatty acids and plant sterols, the herb's key active ingredients. Extraction is done using super-critical carbon dioxide and thus the finished product is free of solvent residues.