"Researchers can't say why zinc works in some studies and not others.
There are still questions about which type of zinc works best. Research
also doesn't show what amount of zinc is the best. And researchers don't
know how people can avoid the side effects of taking zinc. As a result,
it's not clear what the best dose or treatment plan would be.
The limit of zinc for adults is less than 40 mg a day unless their health care providers say otherwise. The safest option is to talk to your provider before using zinc when you have a cold."
I highlighted that sentence because I think that after you've already become sick it's a little too late to try to get a doctors appointment for advice. By that time I doubt if zinc or anything else would be more than just a little help - or any at all. Also my opinion that the vitamin C is equally or more important and combining the two is best.
Interesting that early in the covid pandemic drug stores were running out of zinc.
