What Is Normal PSA Blood Level?


Quick Answer

A normal PSA blood level is 4 nanograms per milliliter of blood, according to MedlinePlus. Men younger than 50 should have levels below 2 ng/mL. Older men usually have levels above 4 ng/ML. PSA refers to a protein made by the prostate gland called prostate-specific antigen.

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Full Answer

The PSA test is a screening tool for prostate cancer, explains Lab Tests Online. It helps determine the need for a prostate biopsy, helps monitor the efficacy of treatment for prostate cancer and detects recurrence of prostate cancer.

A PSA test is usually ordered when a man has symptoms of prostate cancer, such as pelvic and back pain or frequent, painful or difficult urination, notes Lab Tests Online. For men without symptoms of prostate cancer, there is disagreement as to whether a PSA screen is an effective tool for cancer screening, especially in men with naturally higher PSA levels. Current guidelines suggest that a man have a digital rectal exam and a PSA blood test starting at age 50 if at average risk for liver cancer.

A larger prostate, a prostate or urinary tract infection, recent tests or biopsies can skew test results, according to MedlinePlus, along with some medications and certain tests on the bladder or prostate itself.

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