Vitamin D Levels in Alopecia Areata

Does low vitamin D levels play a role in alopecia areata?

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Several previous studies have explored this topic. A new study compared vitamin D levels in 50 patients with AA compared to 35 age matched and sex matched controls. 25-hydroxy-vitamin D levels were lower in patients with AA being 16.6 in the AA group and 40.5 in the control group. 25-hydroxy-vitamin D is the best test for vitamin D status. In addition, patients with more severe AA had lower vitamin D levels than those with less severe AA. Also, those with more patches of AA had lower levels than those with fewer patches.


This study adds to the growing body of evidence showing the vitamin D plays a role in alopecia areata. 


Bhat YJ et al. Vitamin D Level in Alopecia Areata. Indian J Dermatol. 2017 Jul-Aug.

Dr. Jeff Donovan is a Canadian and US board certified dermatologist specializing exclusively in hair loss. To schedule a consultation, please call the Whistler office at 604.283.1887

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