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 b... More »

www.reference.com Health Medical Ranges & Levels

A PSA level is a measurement of the concentration of prostate-specific antigen in the blood, explains MedicineNet.com. PSA is a substance produced in the prostate, and elevated levels can indicate the presence of disease... More »

www.reference.com Health Medical Ranges & Levels

The American Cancer Society recommends starting prostate-specific antigen screening at age 50, notes Mayo Clinic. Men with a higher risk of prostate cancer should be regularly tested, starting at age 40 or 45. More »

www.reference.com Health Medical Ranges & Levels

A normal PSA level is considered to be 4.0 nanograms per milliliter of blood. Doctors often recommend a prostate biopsy to determine whether prostate cancer is present if a man has a PSA level above 4.0 nanograms per mil... More »

A normal PSA level in men is less than 4 nanograms per milliliter, according to WebMD. Because younger patients usually have smaller prostates, some studies suggest that an appropriate PSA level for a younger man is 2.5 ... More »

www.reference.com Health Medical Ranges & Levels

The recommended PSA level for an African American or Caucasian 65-year-old man is zero to 4.5 nanograms per milliliter, according to MedicineNet.com. The suggested level for an Asian American man of the same age is zero ... More »

A normal PSA level in an adult male according to the National Cancer Institute is 4.0 nanograms per milliliter or lower. However, studies show some men who have a lower PSA level do have prostate cancer while some men wi... More »