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All Studies   Meta Analysis    Recent:   
0 0.5 1 1.5 2+ Case 78% Improvement Relative Risk Vitamin D for COVID-19  Katz et al.  Sufficiency Are vitamin D levels associated with COVID-19 outcomes? Retrospective 133,125 patients in the USA Fewer cases with higher vitamin D levels (p=0.001) c19early.org Katz et al., Nutrition, December 2020 Favors vitamin D Favors control

Increased risk for Covid-19 in patients with Vitamin D deficiency

Katz et al., Nutrition, doi:10.1016/j.nut.2020.111106
Dec 2020  
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Vitamin D for COVID-19
8th treatment shown to reduce risk in October 2020
 
*, now known with p < 0.00000000001 from 120 studies, recognized in 8 countries.
No treatment is 100% effective. Protocols combine complementary and synergistic treatments. * >10% efficacy in meta analysis with ≥3 clinical studies.
4,100+ studies for 60+ treatments. c19early.org
Retrospective database analysis showing patients with vitamin D deficiency were 4.6 times more likely to be COVID-19 positive, p<0.001.
This is the 30th of 196 COVID-19 sufficiency studies for vitamin D, which collectively show higher levels reduce risk with p<0.0000000001 (1 in 11,637 vigintillion).
risk of case, 78.4% lower, RR 0.22, p < 0.001, high D levels 85 of 101,175 (0.1%), low D levels 87 of 31,950 (0.3%), NNT 531, adjusted per study, inverted to make RR<1 favor high D levels.
Effect extraction follows pre-specified rules prioritizing more serious outcomes. Submit updates
Katz et al., 4 Dec 2020, retrospective, population-based cohort, USA, peer-reviewed, 3 authors.
This PaperVitamin DAll
Increased risk for COVID-19 in patients with vitamin D deficiency
Joseph Katz, Sijia Yue, Ph Wei D Xue
Nutrition, doi:10.1016/j.nut.2020.111106
Since January 2020 Elsevier has created a COVID-19 resource centre with free information in English and Mandarin on the novel coronavirus COVID-19. The COVID-19 resource centre is hosted on Elsevier Connect, the company's public news and information website. Elsevier hereby grants permission to make all its COVID-19-related research that is available on the COVID-19 resource centre -including this research content -immediately available in PubMed Central and other publicly funded repositories, such as the WHO COVID database with rights for unrestricted research re-use and analyses in any form or by any means with acknowledgement of the original source. These permissions are granted for free by Elsevier for as long as the COVID-19 resource centre remains active.
References
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