Vitamin D supplementation in preventing the recurrence of benign paroxysmal positional vertigo

Objective To evaluate the effect of vitamin D supplementation on the recurrence rate of benign paroxysmal positional vertigo (BPPV). Methods A single‐center, prospective, double‐blind, placebo‐controlled, parallel‐group randomized controlled trial was conducted between November 2018 and May 2020. After successful treatment with canalith repositioning maneuvers, patients diagnosed with BPPV were randomized to either the vitamin D (n = 20) or placebo (n = 18) group. Only patients with serum vitamin D levels