No single level ok: Normal psa levels are age dependent, levels are higher in older people. Up to the age of 60 the upper limit of normal is 4 ng/ml. However if a person had a psa level of 0.5ng/ml and the following year it has gone up to 3 ng/ml that would be a cause for concern even though the results are within "normal" limits. You need to consult your doctor to see if you should get psa done or not.
Answered 9/16/2012
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