---
title: "Which vitamin deficiency causes hair loss? Labs"
description: "Which vitamin deficiency causes hair loss? Vitamin D, low iron stores (low ferritin), zinc, and rarely biotin can contribute. Labs can help confirm."
canonical: "https://www.vitalsvault.com/treatment-learn/which-vitamin-deficiency-causes-hair-loss"
last-updated: 2026-08-22
---

# Which vitamin deficiency causes hair loss? Labs

> Which vitamin deficiency causes hair loss? Vitamin D, low iron stores (low ferritin), zinc, and rarely biotin can contribute. Labs can help confirm.

---

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