• M Yildiz, M U Senel, S Kavurgaci, F E Ozturk, and A Ozturk.
• Bratisl Med J. 2021 Jan 1; 122 (10): 744-747.

BackgroundVitamin D has anti-inflammatory and immunomodulatory effects via the downregulation of pro-inflammatory cytokines. We aimed to demonstrate the effect of vitamin D levels on survival in COVID-19 patients.Materials And Methods207 COVID-19 patients were included in the study. Serum vitamin D levels were measured, and patients with levels <20 ng/ml or 21 to 30 ng received a single 300.000 IU dose of vitamin D.ResultsOf 207 patients, 37 received vitamin D, while 170 did not. Demographic, radiologic and mean laboratory values were similar between the groups. The mean plasma vitamin D level without vitamin D support (n=170) was 50.82±16.12 ng/ml (30.28-81.35) vs. 16.98±6.2 ng/ml (4.20-28.30) in vitamin D group. The most remarkable finding were the mortality rates; while only 1 patient (2.7 %) died in the vitamin D group, 24 patients (14.1 %) died in no vitamin D supplementation group (p=0.038).ConclusionAlthough a few retrospective studies put forth a relation between vitamin D deficiency and COVID-19 course severity there is still paucity of data about the efficacy of vitamin supplementations in COVID-19 patients. A single 300.000 IU dose of vitamin D seems to represent a useful, practical, and safe adjunctive approach for the treatment or prevention of COVID-19 (Tab. 1, Fig. 1, Ref. 30).

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