An AST blood test measures levels of aspartate aminotransferase (AST) and helps determine liver function. Too much of this enzyme can indicate a problem, such as liver damage. Aspartate ...

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 ...

Having persistently high liver enzyme levels present in early adulthood is a strong predictor of type 2 diabetes risk. Learn ...

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 ...

(, N Engl J Med;:-). In the Safety subsection of Results (page 8 in the version published online on December 11, 2019), the paragraph beginning “Elevations in the ALT and AST levels” should have ended ...