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Indian Dermatol Online J. 2019 Jan-Feb;10(1):45-49. doi: 10.4103/idoj.IDOJ_84_18.

Evaluation of Association of Vitamin D in Alopecia Areata: A Case-control Study of 100 Patients in a Tertiary Rural Hospital of Southern India.

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Department of Dermatology, Raja Rajeswari Medical College and Hospital, Kambipura, Mysore Road, Bangalore, Karnataka, India.



Alopecia areata is a common autoimmune disorder which is characterized by non-scarring hair loss. Vitamin D plays an important role in immune regulation, cell growth, differentiation, and maintenance of hair cycle.

Aims and Objectives:

(1) To evaluate serum vitamin D levels in alopecia areata. (2) To compare serum vitamin D levels in new versus old cases and with respect to severity of alopecia areata.

Materials and Methods:

A retrospective case-control study with 100 cases of alopecia areata and 100 age- and sex-matched healthy controls was conducted from December 2014 to November 2015. All subjects underwent complete clinical evaluation and serum vitamin D levels. Results: The mean serum vitamin D level was significantly lower in patients with alopecia areata (18.90 ± 8.32 ng/mL) (64%) as compared to healthy controls (28.21 ± 18.32 ng/mL) (38%) (P < 0.001). The mean serum vitamin D levels was significantly lower in old cases (15.11 ± 4.75 ng/mL) as compared to new cases (20.85 ± 9.09 ng/mL) (P < 0.001). The proportion of subects with vitamin D deficiency was significantly higher among old cases (84.3%) as compared to new cases (53.1%) (P < 0.05). There was a significant inverse correlation between Severity of Alopecia Tool scores and serum vitamin D levels (r = -0.298, P < 0.05).


Decreased vitamin D levels were observed in patients with alopecia areata and significant inverse correlation exists between vitamin D levels and duration/severity of the disease. These findings may suggest a causal role of vitamin D deficiency in the pathogenesis and therapeutic role of vitamin D supplementation in the management of alopecia areata.


Eosinophils; granuloma annulare; plasma cells; vasculitis

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