title: Clinical trial: vitamin D3 treatment in Crohn's disease - a randomized double-blind placebo-controlled study.
abstract: BACKGROUND
  Vitamin D has immune-regulatory functions in experimental colitis, and low vitamin D levels are present in Crohn's disease.
  
  
  OBJECTIVE
  To assess the effectiveness of vitamin D3 treatment in Crohn's disease with regard to improved disease course.
  
  
  METHODS
  We performed a randomized double-blind placebo-controlled trial to assess the benefits of oral vitamin D3 treatment in Crohn's disease. We included 108 patients with Crohn's disease in remission, of which fourteen were excluded later. Patients were randomized to receive either 1200 IU vitamin D3 (n = 46) or placebo (n = 48) once daily during 12 months. The primary endpoint was clinical relapse.
  
  
  RESULTS
  Oral vitamin D3 treatment with 1200 IU daily increased serum 25OHD from mean 69 nmol/L [standard deviation (s.d.) 31 nmol/L] to mean 96 nmol/L (s.d. 27 nmol/L) after 3 months (P < 0.001). The relapse rate was lower among patients treated with vitamin D3 (6/46 or 13%) than among patients treated with placebo (14/48 or 29%), (P = 0.06).
  
  
  CONCLUSIONS
  Oral supplementation with 1200 IE vitamin D3 significantly increased serum vitamin D levels and insignificantly reduced the risk of relapse from 29% to 13%, (P = 0.06). Given that vitamin D3 treatment might be effective in Crohn's disease, we suggest larger studies to elucidate this matter further. ClinicalTrial.gov(NCT00122184).
authors.affiliation: Department of Medicine V, Aarhus University Hospital, Denmark. soerjoer@rm.dk
authors.forename: S P
authors.initials: SP
authors.lastname: Jørgensen
authors.forename: J
authors.initials: J
authors.lastname: Agnholt
authors.forename: H
authors.initials: H
authors.lastname: Glerup
authors.forename: S
authors.initials: S
authors.lastname: Lyhne
authors.forename: G E
authors.initials: GE
authors.lastname: Villadsen
authors.forename: C L
authors.initials: CL
authors.lastname: Hvas
authors.forename: L E
authors.initials: LE
authors.lastname: Bartels
authors.forename: J
authors.initials: J
authors.lastname: Kelsen
authors.forename: L A
authors.initials: LA
authors.lastname: Christensen
authors.forename: J F
authors.initials: JF
authors.lastname: Dahlerup
mesh_terms: D002762:Cholecalciferol / Q000627:therapeutic use*; D003424:Crohn Disease / Q000188:drug therapy*; D004311:Double-Blind Method; D006801:Humans; D012008:Recurrence; D016896:Treatment Outcome; D014815:Vitamins / Q000627:therapeutic use*
chemical_list: D014815:Vitamins; D002762:Cholecalciferol