Association of Alopecia Areata with Vitamin  D and Calcium Levels: A Systematic Review and Meta-analysis

ConclusionDeficiency of serum 25(OH)D level, rather than calcium level, was present in patients with AA. Screening for vitamin  D deficiency and vitamin D supplementation may be beneficial in the treatment of patients with AA.
Source: Dermatology and Therapy - Category: Dermatology Source Type: research