Aspartate Aminotransferase (AST) Blood Test
Woman in medical attire with a stethoscope on a pink background, featuring text about a medical team being ready to help.
Aspartate Aminotransferase (AST) Blood Test
Aspartate Aminotransferase (AST) Blood Test
Aspartate Aminotransferase (AST) Blood Test
Aspartate Aminotransferase (AST) Blood Test
Aspartate Aminotransferase (AST) Blood Test
Woman in medical attire with a stethoscope on a pink background, featuring text about a medical team being ready to help.
Aspartate Aminotransferase (AST) Blood Test
Aspartate Aminotransferase (AST) Blood Test
Aspartate Aminotransferase (AST) Blood Test
Aspartate Aminotransferase (AST) Blood Test

Over 250k Biomarkers Tested

Aspartate Aminotransferase (AST) Blood Test

$38.00 AUD

Want to check your AST level as part of monitoring your liver or muscle health?

Measures AST enzyme released when liver, heart, or muscle cells are damaged. Helps assess liver disease severity and distinguish between different causes of liver dysfunction.
Collection Location
Specimen Type

You will be emailed a referral to take to your local collection centre. If you ever have any questions, we're here to help.

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1
Order a test

Order a test

Order the private test that suits you and your goals. After ordering, you will receive your referral by email.

2
Collect the sample

Collect the sample

Attend one of our 4000+ partner collection centres throughout Australia. Search locations.

3
Receive your results

Receive your results

View all your lab results in your secure health dashboard. Easy!

Overview

AST measures an enzyme present in liver, heart, and muscle cells. When these cells are damaged, AST escapes into the bloodstream, signaling tissue injury.

Unlike ALT which is more liver-specific, AST elevation can indicate liver disease, muscle damage, or heart problems. The pattern of elevation helps narrow the diagnosis—comparing AST to ALT levels provides useful clues about the underlying cause, available across Australia.

This test commonly appears in liver function panels but requires interpretation alongside other markers to distinguish hepatic from non-hepatic causes.

Symptoms

Suited to people assessing liver health, monitoring the effect of medications on the liver, investigating muscle-related symptoms, or following up on a previous abnormal liver result. Frequently ordered as part of a broader liver function panel or metabolic workup.

Questions

  • AST (aspartate aminotransferase) is an enzyme found in the liver, heart, skeletal muscle, and red blood cells. When these cells are damaged, AST is released into the blood. Measuring it helps your practitioner assess liver health and investigate other tissue conditions.
  • No fasting is required. You can eat and drink normally beforehand. Avoid intense exercise in the 24 hours before the test, as muscle activity can temporarily raise AST levels.
  • ALT is more specific to the liver, while AST is found in the liver, heart muscle, skeletal muscle, and red blood cells. Testing both together and looking at the AST to ALT ratio helps your practitioner determine whether elevated levels are coming from the liver or another tissue.
  • Common causes include liver disease (hepatitis, fatty liver, alcohol-related damage), muscle damage from injury or intense exercise, and heart conditions. Your practitioner will review your result alongside other markers and your symptoms to work out the likely cause.
  • Not necessarily. Because AST is present in multiple tissues, elevated levels can come from sources other than the liver. That's why it's typically assessed alongside ALT and other liver markers to build a more complete picture.
  • Results are sent directly to you via the Bloody Good Tests platform. Share them with your GP or healthcare practitioner for interpretation in the context of your symptoms and health history.

Dr. Vu Tran
Bloody Good’s Chief Medical Officer

Biomarker Tested

How to prepare

No fasting is required for an AST test. Drink water as normal.

Let your practitioner know about any medications, supplements, or herbal products you take, as some can affect liver enzyme levels. Strenuous exercise can raise AST due to muscle breakdown, so avoid intense physical activity in the 24 hours before the test if possible. A healthcare professional will take a blood sample from a vein in your arm.

After the test

Share your results with your GP or relevant specialist. If your AST is elevated, your practitioner may request additional tests such as ALT, GGT, ALP, bilirubin, or creatine kinase (CK) to determine the likely source.

If your result is within range but you have ongoing symptoms, your practitioner may investigate other causes.

Your test results will be available in your private dashboard. If there are any urgent issues, we'll let you know so you can follow up with your health professional.

Understanding results

Results are reported in units per litre (U/L). Reference ranges vary between laboratories, but a typical adult range is approximately 10 to 40 U/L, and can differ between males and females.

Elevated AST may be associated with liver conditions including hepatitis, fatty liver disease, and alcohol-related liver damage. It can also be raised after muscle injury, intense exercise, or conditions affecting heart muscle. A high AST in the absence of elevated ALT may suggest a source outside the liver.

Your practitioner will look at AST alongside ALT and other markers before drawing any conclusions or recommending further testing.

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Frequently Asked Questions

Most collection centres accept walk-ins. Some may require a booking - check details when you click on your chosen location.

If your test needs fasting, we’ll include that in your instructions after you order. Fasting usually means no food for 8–12 hours, but water is fine.

Just your pathology referral form (we email it to you)

Of course. Just maybe don’t bring the friend who faints at the sight of blood.

They’re the highly trained professionals who take your blood sample - with a steady hand and a sharp needle. They love blood, but don’t worry… they’re not vampires. Just legends who make blood tests quick, clean, and (almost) painless.

Some of our tests include Urine, Stool, Saliva and more. Each test will have a clear description on what sample you will need to give and instructions on how.