Nutritional Frontiers PSA contains a combination of nutrients and herbs to promote proper function of the prostate gland. The prostate is a gland that plays a role in male reproduction. Many men over age 50 have some prostate enlargement, called BPH – benign prostatic hyperplasia. The enlarged gland causes obstructive symptoms like urinary frequency, urgency, and even sometimes urinary incontinence. The Nutritional Frontiers’ supplement PSA was designed to be helpful for balancing hormones, managing DHT levels, and positively affecting the enzymes that support healthy prostate size and function.