I agree - people should watch their D levels, I do by taking a supplement.

Plus Campbell has gone BATSHIT CRAZY with ivermectin pushing - even though there's no clinical data showing it to be effective. When Paxlovid is readily available I hope he changes his tune. (I stopped watching him when he started pushing vitamin D hard - although Youtube still shows him to me a lot.)

But I can find no reliable studies saying higher levels of Vitamin D improve COVID outcomes.

I do find a LOT of websites and places that sell supplements touting it.

BTW: I'd love for a cheap and easy to get supplement or treatment worked on COVID, but I don't see that be proven in any way yet. Let's hope someone is actively studying it.