Jenssen, Marita; Furberg, Anne-Sofie; Jorde, Rolf; Wilsgaard, Tom; Danielsen, Kjersti (Journal article; Tidsskriftartikkel; Peer reviewed, 2023-03-29)
Importance - Topical vitamin D analogues are routine treatment for psoriasis, but the effect of oral supplementation has not been established.<p>
<p>Objective - To examine the effect of vitamin D supplementation on psoriasis severity throughout the winter.<p>
<p>Design, Setting, and Participants - This randomized, double-blind placebo-controlled clinical trial with 2 parallel groups was performed ...