What should you know about liver function ALT SGPT?

ALT is found mainly inside liver cells. When those cells are irritated or injured, ALT can move into the bloodstream. The result may change with viral hepatitis, alcohol-related injury, fatty liver disease, medicines, supplements, strenuous exercise, or other medical problems. A raised ALT does not show how well the liver is working by itself, and a result within range cannot rule out every liver condition.

The clinician interprets ALT alongside AST, bilirubin, alkaline phosphatase, albumin, clotting tests, symptoms and previous results. The laboratory range and the degree and persistence of change are relevant.

Ask the ordering clinician whether ALT is isolated or part of a wider pattern. Share all medicines, supplements, alcohol use, recent illness and exercise before the test. Do not stop treatment without advice. Depending on the pattern, the next step may be repeat testing, an examination, imaging, or tests for Hepatitis A, Hepatitis B, Hepatitis C or another cause. A general Liver Function Test page can explain the wider panel.

Seek urgent assessment for yellow eyes or skin, severe or persistent abdominal pain, confusion, unusual drowsiness, vomiting blood, black stools, or rapidly worsening illness. Contact a clinician promptly if you have dark urine, pale stools, ongoing vomiting or significant itching with a new abnormal result.

What is my ALT result compared with this laboratory’s range? Are other liver tests abnormal? Could a medicine, supplement, alcohol, infection or exercise have contributed? Do I need a repeat test or further investigation, and when should I seek help?