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Liver function tests are blood tests used to help find the cause of your symptoms and monitor liver disease or damage. The tests measure the levels of certain enzymes and proteins in your blood. Some of these tests measure how well the liver is performing its regular functions of producing protein and clearing bilirubin, a blood waste product.
What Are Normal and Elevated (High) Levels of Liver Enzymes? Common causes of elevated ALT and AST are viral liver infections, alcohol abuse, cirrhosis (from any chronic causes), and more. Normal levels of ALT (SGPT) ranges from about 7-56 units/liter of serum (the liquid part of the blood),
Aspartate aminotransferase (AST) and alanine aminotransferase (ALT) are two liver enzymes measured in a blood test to check the health of your liver. High AST and ALT levels are a general sign of a liver problem.
Liver enzymes test. Your liver enzymes include alkaline phosphatase (ALP), alanine transaminase (ALT), aspartate aminotransferase (AST) and gamma-glutamyl transferase (GGT). These are elevated when there’s liver injury.
If the liver is injured or damaged, the liver cells spill these enzymes into the blood, raising the AST and ALT enzyme blood levels and signaling liver disease. Understanding the ALT and AST normal ranges is crucial, as elevated levels can indicate liver damage.
These tests can help determine an area of the liver where damage may be taking place and, depending on the pattern of elevation, can help organize a differential diagnosis. Elevations in ALT and AST disproportion to elevations in alkaline phosphatase and bilirubin denote hepatocellular disease.
About one-third of people with elevated liver enzymes will have normal liver enzyme levels after two to four weeks. If your liver enzymes stay high, your provider may order more blood tests, or imaging tests such as ultrasound , CT scan or MRI .