ALT: ALT=alanine aminotransferase, previously known as SGPT is used as a marker of liver damage, but is present in low amounts in normal individuals. Sources other than liver also exist. Elevations above the normal range are found in some "innocent" cases depending on population studied, drugs that may be in use, etc. Occasionally, exercise can transiently increase levels, for example.
Answered 5/28/2015
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