Alanine aminotransferase (ALT) is an enzyme that appears mostly in the liver. Having high levels of ALT may be a sign of liver disease. While ALT can also be found in the kidneys, heart, and muscle ...

Doctors can diagnose fatty liver disease, now called metabolic dysfunction-associated steatotic liver disease (MASLD), using blood tests that measure serum liver enzyme levels. Elevated enzyme levels ...

Alanine aminotransferase (ALT) is an enzyme primarily found in your liver. An enzyme is a protein that helps speed up chemical reactions. ALT is involved in cellular energy production. ALT levels in ...