---
title: "Improve Free Triiodothyronine (T3) Naturally: Causes, Labs"
description: "Eat enough calories and protein, manage stress and sleep, and review iodine/selenium intake to support free T3—then retest at Quest, no referral needed."
canonical: "https://www.vitalsvault.com/improve/how-to-improve-your-free-triiodothyronine-t3-naturally"
last-updated: 2026-08-22
---

# Improve Free Triiodothyronine (T3) Naturally: Causes, Labs

> Eat enough calories and protein, manage stress and sleep, and review iodine/selenium intake to support free T3—then retest at Quest, no referral needed.

---

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