# The Role of Vitamin D3 in Periodontal Health: Implications for Bone Metabolism, Immune Modulation and Inflammation Control

## TL;DR

Vitamin D3 supports periodontal health by promoting bone growth, immune function, and reducing inflammation, with potential benefits from both oral and topical use.

## Contribution

This review integrates molecular and clinical evidence to highlight vitamin D3's therapeutic potential in managing periodontal disease.

## Key findings

- Vitamin D3 activates VDR in periodontal cells, enhancing bone formation and immune defenses.
- Adequate vitamin D3 levels improve outcomes of periodontal treatments by reducing PPD and CAL.
- Topical and dose-dependent vitamin D3 supplementation shows promise in clinical applications.

## Abstract

Vitamin D3 is a fat-soluble steroid essential for bone metabolism, immune modulation, and inflammation control, all critical for periodontal health. Its active form, 1,25-dihydroxyvitamin D3, binds to the vitamin D receptor (VDR) in periodontal cells, including periodontal ligament stromal cells, fibroblasts, osteoblasts, and macrophages, enhancing osteogenesis, antimicrobial defenses, and anti-inflammatory responses. Clinical and experimental evidence demonstrates that adequate systemic vitamin D3 levels and local activation in gingival tissues improve outcomes of nonsurgical and surgical periodontal therapies, reducing probing pocket depth (PPD), clinical attachment loss (CAL), and gingival inflammation. Dose-dependent supplementation shows greater clinical efficacy, and emerging evidence supports potential topical applications. This review integrates molecular mechanisms with clinical findings, highlighting the therapeutic potential of vitamin D3 in periodontal disease management.