The several meta‐analyses of the effect of vitamin D on depression have produced inconsistent results and studies dealing with anxiety were not incorporated. There has been no comprehensive analysis of how results are affected by the nature of the sample or the dosage and duration of supplementation. The study is aimed to investigate whether vitamin D supplementation reduces negative emotions and to analyze the possible influence of sample and regimen.

中文翻译：

---

维生素D补充剂对不良情绪的影响：系统评价和荟萃分析。

关于维生素D对抑郁症影响的多项荟萃分析得出的结果不一致，因此未纳入有关焦虑症的研究。尚未对结果如何受到样品性质或添加剂量和添加时间的影响进行全面分析。该研究旨在调查补充维生素D是否能减少不良情绪，并分析样品和治疗方案的可能影响。