---
title: "Thyroid blood test: how to read results"
description: "A thyroid blood test is read by patterns in TSH and free T4, sometimes free T3 and antibodies. Your lab ranges and medicines matter too."
canonical: "https://www.vitalsvault.com/treatment-learn/thyroid-function-test-interpretation"
last-updated: 2026-08-22
---

# Thyroid blood test: how to read results

> A thyroid blood test is read by patterns in TSH and free T4, sometimes free T3 and antibodies. Your lab ranges and medicines matter too.

---

Canonical HTML: https://www.vitalsvault.com/treatment-learn/thyroid-function-test-interpretation
- [llms.txt](https://www.vitalsvault.com/llms.txt)
- [sitemap.xml](https://www.vitalsvault.com/sitemap.xml)
- [Developer portal](https://www.vitalsvault.com/developers)