When covid started, I learned about vitamin D. I take it in high dose every day since. I was never so unaffected by colds as in those almost four years now. A sniffle from time to time, yes. Not one fever since.
Discussion
I need to get on that, thanks for the reminder
Yeah, we started taking Vitamin D supplements back in February 2020. You don't need them in the warmer months if you're actively outside, IMO. Winter on the other hand, I'd say it doesn't hurt.
Vitamin D is such a safe stuff to take in a huge range of dosages and so hard to judge if it works in the moment that I won't take my chances. I'll stay on that stuff for life ;)