If there is a connection with vitamin D, it is very slim:
And here I firmly disagree. Even before Covid-19 appeared, a large body of evidence was already available indicating a significant benefit from higher vitamin D serum levels, especially in response to viral and bacterial infections.
I understand that HCQ and other treatments have been ridiculously politicized. (My opinion on HCQ is the same as Fauci’s; without a truly randomized, large study complete with placebo, we do not know the true effectiveness of the drug on COVID-19. We have a handful of smaller to medium sized studies, all retrospective or case studies, and anecdotal evidence. I would agree that this drug is unproven as an effective treatment and certainly does not meet any meaningful definition of “cure.”)
That said, I have noticed an almost reflexive defense by some more science-minded individuals who are doubtlessly exhausted by refuting baseless HCQ claims from polemical individuals. Where discussions about the effect of Vitamin D on the course of the illness are automatically rejected because it’s (not undeservedly) assumed that the other person is probably another anti-vaccine, anti-, science-based person who’s glommed onto anything sounding “natural” and “miraculous.”
I get it. I’m someone whose undergrad is in public health science. However, I will say that there is substantial evidence that Vitamin D levels are crucial to immune response to infection in general, not just SARS-CoV-2.
If you’re not already familiar with him, check out Dr. Campbell’s videos. He is a nursing instructor of some 30 years in the UK, who has been providing daily, objective updates on Covid-19 since at least early January. His material is generally a review of the numbers, country by country, review of the scientific literature and education on best practices.
I recommend him because he’s discussed the evidence on Vitamin D in a couple of videos. Here’s his most recent.
I’d like to get your opinion on the data he presents if you have time.