The prostate is a single gland lying below the bladder surrounding the urethra. The muscular part of the prostate controls the release of urine. It also increases sperm activity and lubricates the urethra to prevent infection. Benign prostatic hyperplasia (BPH) is a non-cancerous enlargement of the gland, which occurs increasingly in advanced age. Herbal and nutritional supplements may ease the discomfort of BPH.