Last updated by The POOG on September 10, 2020.

This topic collects all topics related to health including diet and supplements.

Vitamin D

Garvin et al (2020)[1] list vitamin D as a potential therapeutic in treating COVID-19 patients. Israel et al (2020)[2] in a study observed “a highly significant correlation between prevalence of vitamin D deficiency and Covid-
19 incidence

A stronger analog of vitamin D, calcifediol, was used in a clinical trial. The r

pilot study demonstrated that administration of calcifediol may improve the clinical outcome of subjects requiring hospitalization for COVID-19.

Castillo (2020)[3]

Calcifediol[5] does have side effects[4].


Converts nmol/L to ng/mL: Vitamin D total.


  1. Garvin, M.R., Alvarez, C., Miller, J.I., et al. A mechanistic model and therapeutic interventions for COVID-19 involving a RAS-mediated bradykinin storm. Elife. 2020 Jul 7;9:e59177. doi: 10.7554/eLife.59177.
  2. Ariel Israel, Assi Albert Cicurel, Ilan Feldhamer, et al. (2020). The link between vitamin D deficiency and Covid-19 in a large population. medRxiv preprint, doi:
  3. Castillo, M.E. , Costa, L.M.E., Barrios, J.M.V., et al. Effect of Calcifediol Treatment and best Available Therapy versus best Available Therapy on Intensive Care Unit Admission and Mortality Among Patients Hospitalized for COVID-19: A Pilot Randomized Clinical study. J Steroid Biochem Mol Biol. 2020 Aug 29;105751. doi: 10.1016/j.jsbmb.2020.105751.
  4. Calcifediol Side Effects. Medically reviewed by Last updated on Jul 15, 2020.
  5. Calcifediol (Oral Route). Mayo Clinic.