Abstract：
In December 2019, Corona Virus Disease 2019 (COVID-19) was first identified and designated as a pandemic in March 2020 due to rapid spread of the virus globally. At the beginning of the pandemic, only a few treatment options, mainly focused on supportive care and repurposing medications, were available. Due to its effects on immune system, vitamin D was a topic of interest during the pandemic, and researchers investigated its potential impact on COVID-19 outcomes. However, the results of studies about the impact of vitamin D on the disease are inconclusive. In the present narrative review, different roles of vitamin D regarding the COVID-19 have been discussed to show that vitamin D supplementation should be recommended carefully.
摘要：
2019年12月，2019年冠状病毒病（COVID-19）首次被确定，并于2020年3月被指定为大流行，原因是该病毒在全球迅速传播。在大流行开始时，只有少数治疗选择，主要集中在支持性护理和重新利用药物，可用。由于它对免疫系统的影响，维生素D是大流行期间人们感兴趣的话题，研究人员调查了其对COVID-19结局的潜在影响。然而,关于维生素D对疾病影响的研究结果尚无定论。在当前的叙述回顾中，已经讨论了维生素D对COVID-19的不同作用，表明应谨慎推荐补充维生素D。
