Endocrinology & Nutrition
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The Role of Vitamin D in Hair Cycle Regulation
Understand how vitamin D receptors guide follicle renewal and why deficiency can slow regrowth.
Source: Clinical EndocrinologyPublished on: August 16, 2024
Abstract in Plain English
Vitamin D is known for bone and immune health, but new evidence links it directly to hair follicle function. This cross-sectional study investigated vitamin D receptor (VDR) levels in patients with chronic telogen effluvium.
Key Findings
- Patients with low serum vitamin D showed reduced VDR expression in follicles.
- Hair regrowth improved after 3 months of vitamin D supplementation.
- Optimal serum range correlated with longer anagen (growth) phase duration.
- Researchers emphasized individualized dosing and medical supervision.
Why It Matters
Vitamin D may serve as both a biomarker and modifiable factor for certain hair loss types. The study reinforces the connection between systemic health and follicular biology.
Study Limitations
This was a correlational study and does not establish causation.
Citation & Review Team
Full Citation
Rahman A. et al., Clin Endocrinol, 2025.Review Team
Author: Student Editor
Fact-Checker: Dermatology Researcher
Disclaimer
This article is for educational purposes only and not a substitute for professional medical advice.