What should you know about liver function test levels?

ALT and AST can rise when liver cells are irritated, although other tissues and medicines can influence them. ALP and GGT may point toward bile-duct irritation or changes in bile flow. Bilirubin helps show how the body processes a yellow pigment, while albumin and clotting tests reflect some of the liver’s longer-term production work.

A mild change may be temporary, and a result within the laboratory interval does not rule out every liver problem. Clinicians look at the combination, whether results are changing, and factors such as alcohol use, weight, infection risk and prescribed or non-prescription medicines. Hepatitis A, Hepatitis B and Hepatitis C are among conditions that may be considered when the pattern fits.

Keep the full report, including the laboratory’s own reference intervals, and arrange a review with the clinician who ordered it. Share every medicine, supplement and herbal product you use; do not stop a prescribed treatment without advice. Your clinician may repeat the blood test, review previous results, or request imaging or additional tests based on the pattern.

Seek prompt medical help for yellowing of the skin or eyes, very dark urine, pale stools, severe or worsening abdominal pain, repeated vomiting, unusual sleepiness, confusion, or bleeding that does not settle. These symptoms need assessment even if the reported level is only mildly outside the interval.

Which results are outside the laboratory interval, and what pattern do they form? Could a medicine, supplement, alcohol exposure or recent illness affect them? Do I need a repeat test or further assessment?