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in the past, most experts viewed prostate-specific antigen (psa) levels less than 4 ng/ml as normal. because of the findings from more recent studies, some recommend lowering the cutoff levels that de


Prostate-specific antigen, or PSA, is a protein produced by normal, as well as malignant, cells of the prostate gland. The PSA test measures the level of PSA in a man’s blood. For this test, a blood sample is sent to a laboratory for analysis. The results are usually reported as nanograms of PSA per milliliter (ng/mL) of blood.


Read about the prostate specific antigen (PSA) test level results and reliability. See how the PSA test helps doctors with patients who have symptoms of prostate cancer. Read about normal ranges of PSA levels and controversy regarding testing.


Normal levels of prostate-specific antigen, or PSA, range from 1.0 to 4.0 nanograms per milliliter of blood, according to MedicineNet. The normal level may, however, be higher in older men and lower in young men because PSA levels increase with age.


Prostate-specific antigen (PSA) is a protein produced by prostate cells. ... If a provider feels the prostate gland is not normal during physical exam. ... A normal PSA level is considered to be 4.0 nanograms per milliliter (ng/mL) of blood. For men in their 50s or younger, a PSA level should be below 2.5 in most cases.


What constitutes an elevated prostate-specific antigen (PSA)? No single normal level has been established. Historically, a level of 4.0 ng/mL or higher was used to justify a biopsy of the prostate (a sample of prostate tissue) to try and determine if a man has prostate cancer.


The prostate specific antigen test is determined by a simple blood test, and is often performed on males 50+ during regular doctor checkups. The PSA level in your blood stream is measured in nanograms per milliliter (ng/mL). What are normal results for a PSA test? The normal PSA serum concentration ranges between 1.0 and 4.0 ng/mL.


Prostate-specific antigen (PSA), also known as gamma-seminoprotein or kallikrein-3 (KLK3), is a glycoprotein enzyme encoded in humans by the KLK3 gene. PSA is a member of the kallikrein-related peptidase family and is secreted by the epithelial cells of the prostate gland.


Prostate Specific Antigen or PSA, is an enzyme found in a man's blood produced exclusively by prostate cells.Normal PSA levels in the blood are very small amounts between 0-2.5 ng/ml. As men age, normal levels can increase slightly.


However, there is no specific normal or abnormal levels of PSA in the blood. In the past, most urologists considered PSA levels of 4.0 ng/ml and lower as normal. Therefore, if a man had a PSA level above 4.0 ng/ml doctors would often recommend a prostate biopsy to determine whether prostate cancer was present.