---
title: "Hypothyroidism: Symptoms, Causes, Tests, and Treatment"
description: "Hypothyroidism means your thyroid is underactive, slowing metabolism and causing fatigue, weight gain, and cold intolerance—confirm with labs and care, no."
canonical: "https://www.vitalsvault.com/conditions/hypothyroidism"
last-updated: 2026-08-22
---

# Hypothyroidism: Symptoms, Causes, Tests, and Treatment

> Hypothyroidism means your thyroid is underactive, slowing metabolism and causing fatigue, weight gain, and cold intolerance—confirm with labs and care, no.

---

Canonical HTML: https://www.vitalsvault.com/conditions/hypothyroidism
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