Alanine aminotransferase (ALT) analysis is a laboratory test that measures the level of the alanine aminotransferase enzyme in the blood, which is considered an important indicator of liver health. This enzyme is produced mainly in the liver, and elevated levels may indicate liver cell damage or inflammation, such as viral hepatitis, alcohol-related effects, or the impact of certain medications. This test is usually performed as part of routine examinations to assess liver function and may be requested when symptoms such as fatigue, jaundice, or abdominal pain appear. Blood sampling is typically preferred in the morning after an 8-hour fast to ensure accurate results. ALT analysis is an effective tool for monitoring liver health and ensuring the absence of more serious medical problems.