Vitamin D3 supplementation and treatment outcomes in patients with depression (D3-vit-dep)

Jens Peter Hansen, Manan Pareek, Allan Hvolby, Anne Schmedes, Tomas Toft, Erik Dahl, Connie Thurøe Nielsen, Jens Peter Hansen, Manan Pareek, Allan Hvolby, Anne Schmedes, Tomas Toft, Erik Dahl, Connie Thurøe Nielsen

Abstract

Objective: To examine whether vitamin D supplementation in patients with depression would result in a reduction in Hamilton D-17 depression score (primary outcome) at 3 and 6 months compared to controls and to explore the correlations between serum vitamin D and symptoms of depression, wellbeing, systolic blood pressure, and waist circumference. In this outpatient multicentre study conducted between 2010 and 2013, patients, 18-65 years old, diagnosed with mild to severe depression were randomly assigned to receive D supplementation 70 micrograms daily or placebo on top of standard treatment. Participants, care givers and those assessing the outcomes were blinded to group assignment.

Results: At baseline, 23 patients had a normal 25(OH)D level, 22 had insufficiency (< 25 nmol/L), and 17 had deficiency (25-50 nmol/L). No significant reduction in depression was seen after vitamin D supplementation compared to placebo at Hamilton (18.4-18.0; p = 0.73 at 12 weeks). Vitamin D supplementation did not provide a reduction in symptom score among patients with depression. Trial registration The trial was registered in the National Board of Health (EudraCT: 2011-002585-20) and in ClinicalTrials.Gov (NCT01390662).

Keywords: Depression; Double-blind method; Drug therapy; Randomised controlled trial; Vitamin D deficiency.

Conflict of interest statement

The authors declare that they have no competing interests.

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