---
title: "AST Test: What It Measures & What High or Low Results Mean"
description: "AST measures an enzyme released with liver or muscle stress, and your result helps guide next-step testing through Vitals Vault labs in the Quest network."
canonical: "https://www.vitalsvault.com/biomarkers/ast"
last-updated: 2026-08-22
---

# AST Test: What It Measures & What High or Low Results Mean

> AST measures an enzyme released with liver or muscle stress, and your result helps guide next-step testing through Vitals Vault labs in the Quest network.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/ast
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