Liver enzymes are proteins in your liver that speed up chemical reactions. If your liver is damaged, blood tests will show abnormally high levels of these enzymes circulating in your bloodstream.
Dear Dr. Roach: I'm a 65-year-old male. On my recent semiannual checkup, my labs showed an AST level of 53 U/L and an ALT level of 62 U/L. I am concerned about nonalcoholic fatty liver disease. In ...