Normal levels of ammonia in the body depend on a person’s age and sex and range from around 100 µmol/L in infants to 16 µmol/L adults assigned male at birth.

In many cases, liver enzyme levels return to normal on their own within about a month. You might need to switch medications, stop taking a supplement, or cut back on drinking if you drink, but you ...

High AST. Higher-than-normal AST levels can be caused by: Chronic (ongoing) hepatitis Alcohol use; Certain medications; Cirrhosis (long-term damage and scarring of your liver) ...

An AST blood test measures levels of aspartate aminotransferase (AST) and helps determine liver function. Less than 40 IU/L is normal, but too much of this enzyme can indicate a problem, such as ...

Normal bilirubin levels For adults over 18 years, normal total bilirubin can be up to 1.2 milligrams per deciliter (mg/dl) of blood. For those under 18, the normal level will be will be 1 mg/dl.

Unusual ALP levels may be a sign of liver problems, a bone disorder, some types of cancer, ... The reference range for normal levels of ALP can vary from laboratory to laboratory.

Laboratory Tests of Liver Function . While most of the so-called liver enzymes are normal, ... and low levels of fibrin-split products (ie, < 40 U) ...