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Choose collection locationBiochemistry · Individual laboratory test
AST is found in liver cells and muscle. Comparing it with ALT helps a clinician assess where an unexpected rise might have come from.
Clinical authorDr Nirupama SabhapathySpecialist Clinical Pathology
Understanding the test
Also called Liver Enzyme (AST / SGOT)
AST can help follow a known liver condition or investigate an abnormal liver panel. Its presence in skeletal muscle also makes a recent injury or intense workout relevant.
AST and ALT may rise together. Comparing them supplies context for further investigation.
A recent muscle injury or demanding session at the gym may be relevant to an isolated AST rise.
Before your sample
AST alone generally does not require fasting. Avoid unusually strenuous training for a day or two before a planned draw and tell the team about recent muscle injury or new medicines.
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 balance between AST and ALT is a clue rather than a diagnosis. When muscle injury is possible, a clinician may consider creatine kinase alongside the liver measurements.
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 Aspartate Aminotransferase (AST/SGOT) in your report. Use the sample type and collection time when comparing it with an earlier report.
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Note recent exercise, muscle injury and medicines. Ask whether your ALT and muscle enzyme results help locate the source of an AST rise.
Health packages
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Basic Health CheckupLiver Profile
Basic Health CheckupBasic Wellness
Basic Health CheckupBasic Health Checkup
Advanced Health PackagesAdvanced Health Checkup
Advanced Health PackagesExecutive Health Checkup
Advanced Health PackagesObesity Profile
Advanced Health PackagesElite Health Checkup
Advanced Health PackagesExtensive Cardiac Function
Advanced Health PackagesFitness Profile
Advanced Health PackagesMaster Health CheckupPatient questions
Yes. Tell your clinician about strenuous exercise or an injury near the collection date. The other liver and muscle results help put the finding into context.
AST is almost always read with ALT, and usually as part of a wider liver panel. When a muscle source is suspected, for example after heavy exercise or an injury, your doctor may add CK, the main muscle enzyme. If the liver is the likely source, further liver tests or imaging may follow.
Skeletal muscle contains a large amount of this enzyme, and intense or unaccustomed exercise causes microscopic muscle damage that releases it into the blood. The rise can last several days, which is why avoiding heavy training before the test is worth doing.
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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.