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Our Health Library information does not replace the advice of a doctor. Please be advised that this information is made available to assist our patients to learn more about their health. Our providers may not see and/or treat all topics found herein.

Prostate-specific antigen (PSA) test

Prostate-specific antigen (PSA) is a substance released into the blood by the prostate, which is part of the male reproductive system. A PSA test measures the amount of prostate-specific antigen in the blood.

Low amounts of PSA may be found in the blood of healthy people. The amount of PSA in the blood normally increases as the prostate enlarges with age. It is also increased by ejaculation, by inflammation of the prostate gland (prostatitis), and by prostate cancer.

Current as of: October 25, 2023

Author: Ignite Healthwise, LLC Staff

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All Healthwise education is reviewed by a team that includes physicians, nurses, advanced practitioners, registered dieticians, and other healthcare professionals.

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