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All Studies   Meta Analysis   Recent:  
0 0.5 1 1.5 2+ Mortality 52% Improvement Relative Risk Ventilation 46% ICU admission 64% Vitamin D for COVID-19  Shah et al.  META ANALYSIS Favors vitamin D Favors control

Does vitamin D supplementation reduce COVID-19 severity? - a systematic review

Shah et al., QJM: An International Journal of Medicine, doi:10.1093/qjmed/hcac040
Feb 2022  
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Meta-analysis of seven systematic reviews showing that vitamin D supplementation reduces the risk of COVID-19 mortality, ventilation, and ICU admission. Authors note that oral and IV supplements were well tolerated, safe, and effective.
10 meta analyses show significant improvements with vitamin D treatment for mortality Argano, D’Ecclesiis, Hariyanto, Hosseini, Nikniaz, Shah, Xie, mechanical ventilation Hariyanto, Meng, Shah, Xie, ICU admission Hariyanto, Hosseini, Meng, Shah, Tentolouris, Xie, hospitalization Argano, severity D’Ecclesiis, Nikniaz, Varikasuvu, Xie, and cases Varikasuvu.
Currently there are 118 vitamin D treatment for COVID-19 studies, showing 36% lower mortality [28‑43%], 16% lower ventilation [-7‑34%], 46% lower ICU admission [28‑60%], 19% lower hospitalization [9‑29%], and 15% fewer cases [7‑23%].
risk of death, 52.1% lower, OR 0.48, p < 0.001, RR approximated with OR.
risk of mechanical ventilation, 46.1% lower, OR 0.54, p < 0.001, RR approximated with OR.
risk of ICU admission, 63.8% lower, OR 0.36, p < 0.001, RR approximated with OR.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Shah et al., 15 Feb 2022, peer-reviewed, 4 authors.
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This PaperVitamin DAll
Does vitamin D supplementation reduce COVID-19 severity? -a systematic review
Komal Shah, Varna Vp, Ujeeta Sharma, Dileep Mavalankar, Jolliffe Martineau Ar, Hooper Da, Greenberg L Rl, Aloia Jf, Al Vitamin, Entrenas Castillo, Costa Lm, Vaquero Barrios, Alcalá Díaz, J F López
Background and Aim: The evidence regarding the efficacy of vitamin D supplementation in 10 reducing severity of COVID-19 is still insufficient. This is partially due to the lack of primary 11 robust trial-based data and heterogenous study designs. This evidence summary, aims to study the 12 effect of vitamin D supplementation on morbidity and mortality in hospitalized COVID-19 13 patients.
Bouillon, Manousaki, Rosen, Trajanoska, Rivadeneira et al., The 281 health effects of vitamin D supplementation: evidence from human studies, Nat Rev 282 Endocrinol
Chen, Mei, Xie, Yuan, Ma et al., Low vitamin D levels do not aggravate COVID-19 risk or death, and vitamin D supplementation does not improve outcomes in 285 hospitalized patients with COVID-19: a meta-analysis and GRADE assessment of cohort 286 studies and RCTs, BMJ Open, doi:10.1186/s12937-021-00744-y28815
Chung, Silwal, Kim, Modlin, Jo, Vitamin D-cathelicidin axis: At the 330 crossroads between protective immunity and pathological inflammation during infection. 331, Immune Netw
Grønborg, Tetens, Christensen, Andersen, Jakobsen et al., Vitamin 333 D-fortified foods improve wintertime vitamin D status in women of Danish and Pakistani 334 origin living in Denmark: a randomized controlled trial, Eur J Nutr
Han, Jones, Tangpricha, Brown, Hao et al., High dose Vitamin 264 D administration in ventilated intensive care unit patients: A pilot double blind 265 randomized controlled trial, J Clin Transl Endocrinol, doi:10.1016/j.jcte.2016.04.004
Hariyanto, Intan, Hananto, Harapan, Kurniawan, Vitamin D supplementation 293 and Covid-19 outcomes: A systematic review, meta-analysis and meta-regression, Rev 294 Med Virol
Karahan, Katkat, Impact of Serum 25(OH) Vitamin D Level on Mortality in Patients 276 with COVID-19 in Turkey, J Nutr Heal Aging
Kulie, Groff, Redmer, Hounshell, Schrager, Vitamin D: An evidence-based 328 review, J Am Board Fam Med
Mercola, Grant, Wagner, Radujkovic, Hippchen et al., Vitamin D 273 and COVID-19 severity and related mortality: a prospective study in Italy, BMC Infect
Murai, Fernandes, Sales, Pinto, Goessler et al., Effect of a 260 Single High Dose of Vitamin D3on Hospital Length of Stay in Patients with Moderate to 261 Severe COVID-19: A Randomized Clinical Trial, JAMA -J Am Med Assoc
Nikniaz, Akbarzadeh, Hosseinifard, Hosseini, The impact of vitamin D 296 supplementation on mortality rate and clinical outcomes of COVID-19 patients: A 297 systematic review and meta-analysis, Pharm Sci
Pal, Banerjee, Bhadada, Shetty, Singh et al., Vitamin D supplementation 299 and clinical outcomes in COVID-19: a systematic review and meta-analysis, Diabetes Metab Syndr Clin Res Rev, doi:10.1007/s40618-021-30101614-4302
Rizzoli, Griffin ; G, Hewison, Hopkin, Kenny, Quinton et al., Vitamin D and 322 COVID-19: Evidence and recommendations for supplementation, R Soc Open Sci, doi:10.1007/s40520-020-32001678-x321
Shah, Saxena, Mavalankar, Vitamin D supplementation, COVID-19 and disease 306 severity: A meta-analysis, Qjm
Shen, Mei, Zhang, Xu, The Effect of Vitamin D Supplementation on Clinical 278 Outcomes for Critically Ill Patients: A Systemic Review and Meta-Analysis of 279 Randomized Clinical Trials, Front Nutr
Stroehlein, Wallqvist, Iannizzi, Mikolajewska, Metzendorf et al., Vitamin D supplementation for the treatment of COVID-19: a living systematic review
Vaughan, Trott, Sapkota, Premi, Roberts et al., Changes in 25-315 hydroxyvitamin D levels post-vitamin D supplementation in people of Black and Asian 316 ethnicities and its implications during COVID-19 pandemic: A systematic review, Nutr Diet
Wang, Wang, Li, Chen, Han et al., Human Cathelicidin Inhibits 325 SARS-CoV-2 Infection: Killing Two Birds with One Stone, ACS Infect Dis
Webb, Kazantzidis, Kift, Farrar, Wilkinson et al., Colour Counts: 338 Sunlight and Skin Type as Drivers of Vitamin D Deficiency at UK Latitudes, Nutrients
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