Vitamin D trials found lower depressive symptom scores
A meta-analysis favored supplementation over controls, but the abstract leaves the participants, treatment duration and practical size of the benefit unclear.
Based on the published abstract. The full paper may contain additional methods, results and limitations.
The 30-second takeaway
Across the included trials, vitamin D supplementation reduced depressive symptom scores relative to controls. The pooled result concerns symptom ratings, and the abstract does not report recovery or remission. Although the authors highlight people with low baseline vitamin D, they provide no subgroup estimate showing how the result differed according to initial vitamin D status.
This abstract-based assessment lacks participant characteristics, doses, intervention lengths and study-quality results. Without those details, it cannot establish who is most likely to benefit or how meaningful the average score difference would be.
What researchers found
Depressive symptom scores
The pooled standardized mean difference favored vitamin D over controls. Assessment timing is not reported; the estimate is not a percentage reduction in depression.
What the estimate captures
The analysis combined depressive symptom scores into a standardized effect. That summarizes the direction and size of the pooled difference on a statistical scale, but does not supply a change in any named questionnaire's points.
The deficiency claim needs detail
The authors suggest a possible adjunctive role, especially when vitamin D is initially low. However, the abstract reports only the overall pooled result, leaving the evidence for that specific subgroup unavailable for this summary to assess.
The original publication
Meta-analysis of the effect of vitamin D on depression.
Wang L, Su S, Liu Y
Front Psychiatry · 2025
- PubMed ID
- 40821024
- Record checked
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