AST:ALT Ratio
The AST:ALT ratio compares the levels of two liver enzymes. A ratio above 1 may indicate liver injury, alcoholic liver disease, or other liver conditions.
Category: Liver Function
Also known as: ast : alt
Reference range: 0–1 ratio (Source: ABIM)
Standard unit: ratio
High values may indicate
A ratio greater than 1 may suggest alcoholic liver disease, cirrhosis, or other hepatic pathology.
Low values may indicate
A ratio below 1 is generally normal and suggests non-alcoholic liver disease if enzymes are elevated.
Frequently asked questions
- What is a normal AST:ALT Ratio level?
- A typical reference range for AST:ALT Ratio is 0–1 ratio (source: ABIM). Reference ranges vary by laboratory, age, and sex, so always compare against the range on your own lab report.
- What units is AST:ALT Ratio measured in?
- AST:ALT Ratio is most commonly reported in ratio. Labs in different countries may use other units — you can convert between them with BloodId's blood test unit converter.
- Where do AST:ALT Ratio reference ranges come from?
- BloodId uses ABIM standard reference ranges and educational information from MedlinePlus (see our methodology). Reference ranges still vary by lab, age, and sex, so always compare against your own report.
- Can I track AST:ALT Ratio over time?
- Yes. Upload results from any lab and BloodId charts your AST:ALT Ratio over time against its reference range, so you can see whether the trend is rising, falling, or stable.
Related biomarkers
Source: BloodId admin-reviewed
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