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Are these ALT's the same?
Oct 29, 2004

Dear Dr.

I most often see an ALT test range of 0-40 with normal around 20. My lab's range for the ALT test is 0-60. Is an ALT reading of 36 still normal or the high of normal based on the 0-40 range? I thought all labs were the same. This is confusing. Thanks very much.

Response from Dr. McGovern

This is a very good question. All laboratories have their own reference range for what is normal so you should only be concerned if your ALT is abnormal in your own laboratory. Do not compare lab to lab.

Dr. McGovern

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