Biomarker education
ALT
Also called: Alanine aminotransferase, SGPT
ALT is an enzyme often included in liver-related blood panels.
General biomarker education — not personalized medical advice. Learn more
What it generally measures
ALT is found in liver cells and elsewhere. Blood levels can change for many reasons; labs report activity or concentration according to their method.
Common units on reports: U/L
Why people track it over time
ALT is commonly compared across panels with AST and other markers. Trends are context for a clinical conversation, not a diagnosis.
Changes over time do not by themselves establish a diagnosis. Learn more
Questions you might ask a healthcare professional
- Ask how ALT compares with AST and prior results.
- Share medication, supplement, or illness context your clinician has asked about before.
- Confirm the reference range printed on your source report.
Related markers
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