For what it’s worth, I had a physical in my mid-20s where my doctor saw my vitamin D levels were low, so he told me to supplement with vitamin D. I take 10,000 IU with vitamin K about 5x/week. I am 35 now and I happened to check my levels around Jan 2020, to make sure I wasn’t overdoing it. I was at 53 ng/mL, which was perfect.

The pandemic came around, and while a lot of people around me got sick, I never did, but I had also been good about mask adherence. So I was a little surprised in August 2020 when my doctor gave me a COVID antibody test (blood draw), just to see, had come back positive, considering I had felt completely fine through that whole period.

Then again a few months later, when my SO came down with covid, needless to say we had extremely close contact during the infectious period, and I was still completely fine.

I’m not trying to be a vitamin D evangelist or anything, of course I could just be one of the lucky ones when it comes to covid, but I feel like it’s a cheap and easy thing to try if you aren’t currently supplementing. And of course, I am vaccinated as well now.