AST is an enzyme that helps metabolize amino acids. Aspartate transferase (AST), also known as aspartate aminotransferase, is an enzyme that exists in your liver, heart, brain, pancreas, kidneys, muscles, and many tissues in your body. Although it can be found throughout your body, AST is most commonly associated with liver health.
When your cells get damaged, AST can leak into your bloodstream. Because of this, high levels of AST in a blood sample can be a sign of an underlying medical condition — most often (but not always), a liver condition.







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