When should I worry about AST and ALT?

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.

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What does it mean when your AST and ALT levels are high?

If you have high levels of AST and/or ALT, it may mean that you have some type of liver damage. You may also have an AST test as part of a group of liver function tests that measure ALT, and other enzymes, proteins, and substances in the liver.

What is a critical ALT level?

Standard medical education dictates that the vast majority of cases of an alanine aminotransferase (ALT) level >1,000 IU/l will be due to acute ischaemia, acute drug-induced liver injury (DILI) (usually paracetamol) or acute viral hepatitis.

Which is worse high AST or ALT?

In addition, patients with Wilson’s disease or cirrhosis due to viral hepatitis may have an AST that is greater than the ALT, though the ratio typically is not greater than two. When the AST is higher than ALT, a muscle source of these enzymes should be considered….

AST/ALT ratio
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What is an unsafe ALT level?

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.

What level of AST is concerning?

Normal AST ranges

	Adults	Children
Normal	<36 U/L	10–40 IU/L
High	>36 U/L >1,000 U/L are very high levels and may be a sign of liver injury or hepatitis	>40 IU/L which may be a sign of liver inflammation

When should I worry about ALT levels?

Having a lower than normal ALT result is uncommon and usually isn’t a cause for concern. However, a lower than normal ALT level could indicate a vitamin B6 deficiency or chronic kidney disease.

Is 300 high for liver enzymes?

Elevated values up to 300 U/L are considered nonspecific. Marked elevations of ALT levels greater than 500 U/L observed most often in persons with diseases that affect primarily hepatocytes such as viral hepatitis, ischemic liver injury (shock liver) and toxin-induced liver damage.