A PSA test measures the level of prostate-specific antigen (PSA) in a man’s blood. PSA is a protein produced by both cancerous and non-cancerous tissue in the prostate, a small gland that sits below the bladder and surrounds the urethra. The PSA test is a valuable tool for the early detection and management of prostate cancer. It provides critical information that can guide screening, diagnosis, and treatment decisions. Men considering the PSA test should discuss the benefits and risks with their healthcare provider to make an informed decision based on their individual risk factors and health status.