Is vitamin D supplement accompanied with narrow band UVB effective for treatment of vitiligo?

Combination of NB‐UVB phototherapy and oral vitamin D supplementation in patients with generalized vitiligo: A randomized, triple‐blind, placebo‐controlled clinical trial

“…6 Previous studies have used lower doses as monotherapy or higher doses with phototherapy for a shorter time without demonstrating conclusive results. 7,8 Unlike the previous studies, our follow-up was longer, with a daily, higher supplement dose. A sufficient accumulated dose is needed for significant, clinical improvements.…”