---
title: "Does levothyroxine cause weight gain? Facts"
description: "Usually no. Levothyroxine treats low thyroid hormone, which can cause weight gain. Weight changes may signal under or over treatment. Talk to a clinician."
canonical: "https://www.vitalsvault.com/treatment-learn/does-levothyroxine-cause-weight-gain"
last-updated: 2026-08-22
---

# Does levothyroxine cause weight gain? Facts

> Usually no. Levothyroxine treats low thyroid hormone, which can cause weight gain. Weight changes may signal under or over treatment. Talk to a clinician.

---

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