(pre-covid) I had an older co-worker that told me he doesn't regularly supplement w. vitamins, but as soon as he feels himself coming down with something, he takes some zinc, and said he could usually kick most colds before they really got a hold. I'd never heard of that before, and would always try vitamin C or whatever. I've tried zinc once, (again, pre covid days), and I guess I kicked whatever I was about to get. Would it have made a difference, who knows?
It would. At least with colds, both the theory is pretty clear and there’s mounting experimental evidence. Zinc is pretty much a common cold cure, if you take it early enough and have a decent immune system to start with.
