In most cases, the low levels of liver enzymes such as ALT are not a cause of concern. However, elevated levels may be a sign that your liver is not working properly.
The effects of decreased liver function may be:
Jaundice: caused by excessive amounts of bilirubin (a pigmented waste product of old red blood cells) in the bloodstream.
Cholestasis: occurs when the flow of bile stops because of a blockage inside or outside of the liver.
Abdominal discomfort or “feeling full” due to an enlarged liver.
Liver encephalopathy: when the liver fails to filter blood normally and remove harmful substances from the bloodstream, toxins can build up and travel to the brain.
Liver failure occurs when many liver cells are damaged and are no longer able to function at all.