The AST/ALT ratio (De Ritis ratio) compares the two main liver enzymes.
- Normal range (adults)
- Up to 1
- Sample
- Blood
- Fasting
- Not usually needed
- Also called
- De Ritis Ratio, AST ALT Ratio, SGOT/SGPT Ratio
AST/ALT Ratio normal range
| Group | ValueSame unit in all countries |
|---|---|
| Adults | Up to 1 |
Ranges vary slightly between laboratories. The range printed on your own report is the one to go by.
Why is the AST/ALT Ratio test done?
It helps suggest the cause of raised liver enzymes.
What does a high AST/ALT Ratio level mean?
A ratio above 2 suggests alcohol-related liver disease; above 1 can also point to advanced scarring (fibrosis) or muscle damage.
Common causes
- Alcohol-related liver disease
- Cirrhosis
- Muscle injury
Diet and lifestyle tips
- Stop alcohol
- Healthy weight and balanced diet
When should you see a doctor?
The ratio is only meaningful when the enzymes are raised; discuss it with your doctor.
Last updated
This page is for general education and is not a diagnosis. Normal ranges differ between laboratories, so always compare your result with the reference range printed on your own report, and discuss abnormal results with your doctor.