An AST/ALT ratio higher than one (where the AST is higher than ALT) means you may have cirrhosis. An AST/ALT ratio higher than 2:1 (where the AST is more than twice as high as the ALT) is a sign of alcoholic liver disease.
High levels of AST in the blood may be a sign of hepatitis, cirrhosis, mononucleosis, or other liver diseases. High AST levels may also be a sign of heart problems or pancreatitis. If your results are not in the normal range, it doesn't always mean that you have a medical condition that needs treatment.
The AST is typically in the 100 to 200 IU/L range, even in severe disease, and the ALT level may be normal, even in severe cases. The AST level is higher than the ALT level, and the ratio is greater than 2:1 in 70% of patients. A ratio greater than 3 is strongly indicative of alcoholic hepatitis.
Typically the range for normal AST is reported between 10 to 40 units per liter and ALT between 7 to 56 units per liter. Mild elevations are generally considered to be 2-3 times higher than the normal range. In some conditions, these enzymes can be severely elevated, in the 1000s range.
Generally speaking, a normal AST level for adults is: 8 to 48 IU/L. A normal ALT level for adults is 7 to 55 IU/L. The high end of the reference range is referred to as the upper limit of normal (ULN).
Your ALT level is considered high if it exceeds the normal range of 0 to 44 IU/L. Some laboratories may present a slightly different reference interval, but a test result of 55 IU/L or above could indicate liver problems.
An elevated serum AST in relation to serum ALT (alanine aminotransferase) has been proposed as an indicator that alcohol has induced organ damage. Thus, when AST/ALT ratio is >1.5, this is considered as highly suggestive that alcohol is the cause of the patient's liver injury (Correia et al., 1981; Salaspuro, 1987).
A high AST (above 40 U/L) can signal a problem with the liver, heart, or muscles. However, a variety of factors can affect an AST result including age, diet, exercise, and the drugs and supplements a person is taking.
A high AST level often means there is some liver damage, but it is not necessarily caused by hepatitis C. A high AST with a normal ALT may mean that the AST is coming from a different part of the body. It is important to realize that the AST level in most patients with hepatitis C goes up and down.
Liver diseases, medical conditions, medications and infections can cause elevated liver enzymes. Common causes for elevated liver enzymes include: Certain medications, such as cholesterol-lowering drugs (statins) and acetaminophen. Fatty liver disease, including alcohol-related and non-alcohol-related conditions.
AST is an enzyme that helps metabolize amino acids. Like ALT, AST is normally present in blood at low levels. An increase in AST levels may indicate liver damage, disease or muscle damage.
Acute hepatitis causes AST levels to elevate for roughly one to two months before returning to normal, which might take about three to six months.
Usually, the upper limit of ALT is 35 - 40 U/L. Moderate increase in ALT (such as 70 U/L) is seen in chronic hepatitis, chronic obstruction of bile ducts, heart damage, alcohol abuse, liver tumor, skeletal muscle damage. In any acute liver conditions, ALT is much more elevated.
The blood test checks for raised levels of AST and ALT, which are enzymes that the liver releases when it becomes inflamed or damaged.
Normal ranges for AST are: Men: 14 to 20 units/L. Women: 10 to 36 units/L.
Generally, symptoms of alcoholic liver disease include abdominal pain and tenderness, dry mouth and increased thirst, fatigue, jaundice (which is yellowing of the skin), loss of appetite, and nausea. Your skin may look abnormally dark or light. Your feet or hands may look red.
Gamma-glutamyl transpeptidase test: This test measures the level of gamma-glutamyl transpeptidase (an enzyme that is produced in the liver, pancreas, and biliary tract). This test is often performed to assess liver function, to provide information about liver diseases, and to detect alcohol ingestion.
Most patients with alcoholic liver disease will have AST/ALT ratios below 2.0 and many below 1.0, which could conceivably be because some patients could have coexisting alcoholic as well as viral liver disease.
In general, high levels of ALT may be a sign of liver damage from hepatitis, infection, cirrhosis, liver cancer, or other liver diseases. The damage may also be from a lack of blood flow to the liver or certain medicines or poisons.
If they are constantly in the 50 to 200 range we term the hepatitis B infection active. ALT's range from 0 up to 3000 or so in many acute hepatitis cases. They change with every meal so it is important not to panic if they go from 20 to 45 after a few months. All scores below 45 indicate a perfectly healthy score.
ALT levels are normally less than 40 international units per liter (IU/L). Levels above 1,000 IU/L may be a sign of: Acute viral hepatitis. Lack of blood flow to the liver.