What is AST in Blood Work and AST SGOT Blood Test
An AST blood test in blood work measures aspartate aminotransferase, an enzyme released from the liver, heart, and muscles. Normal AST levels are about 10–40 U/L in men and slightly lower in women. High levels suggest liver damage, muscle injury, or inflammation, while low levels are usually not clinically significant. Understanding what is AST SGOT blood test helps assess organ function and detect early disease.
Contents
Result interpretation AST
What your result means based on common reference ranges
AST levels within range indicate stable liver function and no active tissue damage or metabolic disturbance.
Mildly elevated AST levels suggest early liver irritation, fatty liver, or recent muscle strain after exercise.
Severely high AST levels indicate acute liver injury, hepatitis, or significant muscle breakdown requiring urgent evaluation.
Low AST levels are usually clinically insignificant but may relate to vitamin B6 deficiency or chronic kidney disease.
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What is AST?
AST (aspartate aminotransferase), also known as AST SGOT, is an enzyme involved in amino acid metabolism and cellular energy production. It is present in liver cells, cardiac muscle, and skeletal muscle. When tissue damage occurs, AST levels in a blood test rise due to enzyme leakage into circulation. It is commonly evaluated alongside ALT, GGT, and bilirubin in liver panels. In clinical practice, AST blood test levels help detect liver disease, muscle injury, or alcohol-related damage. However, AST is not liver-specific, so interpretation always depends on combination with other biomarkers and clinical context.
Reference ranges
Causes of abnormal values
Causes of low AST
- • Vitamin B6 deficiency — reduced enzyme synthesis lowers AST production
- • Chronic kidney disease — altered metabolism decreases circulating AST levels
- • Dialysis — mechanical removal of enzymes reduces measurable AST concentration
Causes of high AST
- • Non-alcoholic fatty liver disease — fat accumulation causes chronic liver cell irritation and enzyme release
- • Alcohol consumption — toxic effect damages hepatocytes leading to increased AST levels
- • Viral hepatitis — liver inflammation causes rapid enzyme leakage into bloodstream
- • Intense physical exercise — muscle fiber breakdown increases AST release
- • Medications (statins, acetaminophen) — drug-induced liver stress elevates enzyme levels
- • Gallstones — bile duct obstruction causes liver cell pressure and enzyme elevation
AST in combination with other markers
Possible symptoms
- •Jaundice (yellow skin or eyes)
- •Dark urine
- •Right upper abdominal pain
- •Fatigue and weakness
- •Nausea or reduced appetite
When to see a doctor
Consult a doctor if AST levels exceed 80 U/L repeatedly or continue rising over time. Seek urgent care if elevated AST is combined with jaundice, severe abdominal pain, or fatigue. Persistent abnormalities require further investigation with additional liver tests and imaging.
What to do if abnormal
- Stop alcohol intake to reduce liver stress
- Review medications with a doctor for hepatotoxic effects
- Maintain hydration to support metabolic processes
- Avoid intense exercise before repeat testing
- Improve diet by reducing fats and sugars
The information on this page is intended for general understanding of test results and does not replace medical consultation. Accurate interpretation requires considering other blood markers and individual factors.
Content is based on medical literature and used within the PulseBook analytical system.
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