The prostate is a small gland located at the base of the bladder. The prostate's only function is as a reproductive organ. The #1 method to help support a healthy prostate - bit.ly/34Mt3zo The prostate produces fluid that supports and assists sperm for conception. PSA is an enzyme that is produced by the prostate that assists sperm. By chance, some PSA is also released into the bloodstream. It has no known function in the bloodstream, but is measurable in all men by a blood test, and forms the basis of PSA testing for prostate cancer. PSA is by no means a perfect test for prostate cancer, but it can be an early indication of problems.