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Choose collection locationBiochemistry · Individual laboratory test
ALT is an enzyme concentrated inside liver cells. The amount in blood gives a clinician one clue about liver cell injury.
Clinical authorDr Nirupama SabhapathySpecialist Clinical Pathology
Understanding the test
Also called Liver Enzyme (ALT / SGPT)
ALT may be checked when a liver panel changes, during follow-up of a known liver condition, or when a medicine requires monitoring. Bring earlier results if the question is whether the level has changed.
A clinician may compare ALT before and during treatment when a medicine can affect the liver.
Comparison with previous measurements helps assess how an existing pattern is changing over time.
Before your sample
ALT alone generally requires no fast. Avoid unusual heavy exercise for a day or two before a planned sample and bring your medicines and supplements list, particularly for monitoring.
A clinician takes a small sample of blood from a vein. The laboratory uses serum, the liquid separated from the blood after it clots.
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The clinician compares ALT with AST, bilirubin and other liver measurements. Persistent mild elevation and a rapid change during illness call for different investigations, even if both results are flagged.
From sample to follow-up

Choose your location, add the test to your care bag and select a time. If you are booking for someone else, assign the test to them in checkout.
Choose collection locationLook for Alanine Aminotransferase (ALT/SGPT) in your report. Use the sample type and collection time when comparing it with an earlier report.
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Bring your previous ALT and AST results and a list of recent medicines or supplements. Ask whether the pattern calls for a repeat draw or a different investigation.
Health packages
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Basic Health CheckupLiver Profile
Basic Health CheckupBasic Wellness
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Advanced Health PackagesAdvanced Health Checkup
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Advanced Health PackagesExtensive Cardiac Function
Advanced Health PackagesFitness Profile
Advanced Health PackagesMaster Health CheckupPatient questions
ALT measures enzyme release. Albumin, bilirubin and other findings answer different questions about liver function. The size of the ALT rise alone does not identify its cause.
Yes. Statins, paracetamol, some antibiotics and other pain relievers are recognised causes of a raised ALT, as are herbal products. A mild rise does not automatically mean a medicine must change: your doctor weighs the size of the rise and its trend, and may repeat the test. Bring a full list of what you take, including over-the-counter products.
Jaundice, fatigue and abdominal pain are the symptoms that most often prompt an ALT test. Many people have none at all: ALT is a sensitive early marker that often rises before any symptom appears, which is why it is used as a routine liver screen and for people taking medicines that may affect the liver.
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Written by Dr Nirupama Sabhapathy, Specialist Clinical Pathology. Medically reviewed by Dr Joyce Jose, Specialist Clinical Pathology, on .
Catalogue information and AED price checked on 2 November 2026. Clinical suitability, preparation, collection arrangements and turnaround are confirmed for your selected test.