---
title: "Hair loss causes: common reasons and tests"
description: "Hair loss can come from genetics, stress, hormones, illness, or deficiencies. This guide explains common causes, helpful tests, with clinician guidance."
canonical: "https://www.vitalsvault.com/treatment-learn/hair-loss-causes"
last-updated: 2026-08-22
---

# Hair loss causes: common reasons and tests

> Hair loss can come from genetics, stress, hormones, illness, or deficiencies. This guide explains common causes, helpful tests, with clinician guidance.

---

Canonical HTML: https://www.vitalsvault.com/treatment-learn/hair-loss-causes
- [llms.txt](https://www.vitalsvault.com/llms.txt)
- [sitemap.xml](https://www.vitalsvault.com/sitemap.xml)
- [Developer portal](https://www.vitalsvault.com/developers)