Native to the Southern Atlantic coast of the United States, the saw palmetto berry was used by Native Americans for a variety of health concerns, and was found especially useful for older men. Numerous studies have shown that the berry contains fatty acids which may inhibit the conversion of testosterone into dihydrotestosterone within the prostate. Two Source Naturals softgels contain the exact amount (320 mg) and concentration of saw palmetto fatty acids (85-95%) administered in clinical trials.