---
title: "Thyroid Cascading Reflex Test: What It Measures"
description: "It checks TSH first and automatically adds thyroid hormone tests when needed, with convenient ordering and Quest-based lab draw through Vitals Vault."
canonical: "https://www.vitalsvault.com/biomarkers/thyroid-cascading-reflex"
last-updated: 2026-08-22
---

# Thyroid Cascading Reflex Test: What It Measures

> It checks TSH first and automatically adds thyroid hormone tests when needed, with convenient ordering and Quest-based lab draw through Vitals Vault.

---

Canonical HTML: https://www.vitalsvault.com/biomarkers/thyroid-cascading-reflex
- [llms.txt](https://www.vitalsvault.com/llms.txt)
- [sitemap.xml](https://www.vitalsvault.com/sitemap.xml)
- [Developer portal](https://www.vitalsvault.com/developers)