D3 is not a Dietary supplement but if you want to believe that good luck.
Why is Brigham and Womens doing a FDA clinical study on D3 to
alleviate covid?
Vitamin D and COVID-19 Trial - Full Text View - ClinicalTrials ...clinicaltrials.gov › show › NCT04536298 Sep 2, 2020 — Listing a study does not mean it has been evaluated by the U.S. Federal Government. ... JoAnn E. Manson, MD, Brigham and Women's Hospital ... The Vitamin D and COVID-19 Trial (VIVID) is a nationwide randomized clinical trial in ... Efficacy of Vitamin D3 Supplementation to Reduce Disease Severity in ...
"By definition, vitamin D is a hormone,"Holick told MedPage Today. "The body synthesizes it after sun exposure, and it's activated by the liver and kidneys. That activated form again acts like a hormone to regulate calcium metabolism."Jul 31, 2014