What the main results mean
ALT and AST are enzymes released when liver cells are irritated or damaged (for example by fatty liver, alcohol, viruses or some medicines). ALP and GGT relate more to the bile ducts. Bilirubin is the pigment that causes jaundice when high, and albumin and clotting reflect the liver's working capacity.
Mildly abnormal LFTs are very common and often have a simple explanation. The pattern of which tests are raised helps point to the cause.
What happens next?
Depending on the pattern and your history, your doctor may repeat the tests, ask about alcohol and medicines, arrange a scan (such as an ultrasound), or check for viral hepatitis and other causes.
Persistently abnormal results, or signs of more serious liver disease, prompt further investigation and sometimes specialist referral.
Common questions
Are mildly abnormal liver tests serious?
Usually not by themselves — they are common and often due to things like fatty liver. But they should be followed up to find the cause and to check they are not getting worse.
Related tools
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