---
title: "What does B12 do for the body? Key roles"
description: "What does B12 do for the body? Vitamin B12 helps make red blood cells, support nerves, and build DNA. Low B12 can cause anemia and nerve symptoms."
canonical: "https://www.vitalsvault.com/treatment-learn/what-does-b12-do-for-the-body"
last-updated: 2026-08-22
---

# What does B12 do for the body? Key roles

> What does B12 do for the body? Vitamin B12 helps make red blood cells, support nerves, and build DNA. Low B12 can cause anemia and nerve symptoms.

---

Canonical HTML: https://www.vitalsvault.com/treatment-learn/what-does-b12-do-for-the-body
- [llms.txt](https://www.vitalsvault.com/llms.txt)
- [sitemap.xml](https://www.vitalsvault.com/sitemap.xml)
- [Developer portal](https://www.vitalsvault.com/developers)