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In addition to AST and ALT, alkaline phosphatase, 5' nucleotidase, and gamma-glutamyl transpeptidase (GGT) are a few of the other enzymes located in the liver.
The focus of this article is mainly on the most common liver enzymes, AST and ALT. It makes many of the chemicals required by the body to function normally, it breaks down and detoxifies substances in the body, and it also acts as a storage unit.
But when the liver is injured for any reason, these enzymes are spilled into the blood stream.
Enzymes are proteins that are present throughout the body, each with a unique function.
Briefly, some of the important functions of the human liver are: Liver blood tests are some of the most commonly performed blood tests.
For example, AST level in serum is elevated in heart attacks or with muscle injury.An initial step in detecting liver damage is a simple blood test to determine the level of certain liver enzymes (proteins) in the blood.Under normal circumstances, these enzymes mostly reside within the cells of the liver.Consequently, if you have "...elevated liver enzymes" or a high or abnormal liver test, you need to ask your physician exactly what all of the tests indicate.The blood tests that truly reflect liver function are the following; normal values (ranges) listed are for adult men - women and children have similar but slightly different ranges of normal test values Note that many hospitals and doctor's offices list a liver function panel as part of a lab workup.