Collection: Liver Health Blood Tests

Liver enzymes including ALT, AST, GGT, and ALP are released into the bloodstream when liver cells are damaged or stressed. Elevated levels indicate liver cell injury from causes such as fatty liver disease, alcohol, medications, viral hepatitis, or autoimmune conditions. The pattern and degree of elevation helps identify the cause.

ALT is the most specific marker for liver cell damage, found predominantly in liver tissue. GGT is sensitive to alcohol intake and bile duct problems. ALP elevation can indicate liver, bile duct, or bone disease. Together these markers provide a comprehensive picture of liver function.

Elevated ALT and GGT are often the first blood test indicators of non-alcoholic fatty liver disease, the most common liver condition in Australia affecting approximately 1 in 3 adults. However, some people with significant fatty liver have normal enzyme levels and liver ultrasound is needed for confirmation.

GGT is particularly sensitive to alcohol consumption and can be elevated even from moderate regular drinking. ALT and AST are elevated by alcohol-related liver inflammation. For the most accurate baseline reading, avoid alcohol for at least 48 to 72 hours before a liver function test.