You can buy zinc supplements but also available are zinc/copper supplements. If a person takes too much zinc it uses the same receptors as copper so can create a temporary copper deficiency. So when I order zinc supplement I also make sure it has a small amount of copper supplement with the capsule. Not that I know anything. That is just what the big boys tell me.

But I agree with you on the zinc for colds and viruses. Both quercetin and ivermectin help zinc do its job allowing it to better get into the cells. That is why all three were on the protocol for treating covid. Zinc is a heavy hitter but it has to get into the cells to be effective. But hey, I am not a doctor. That is only what I have heard. Seems to work for me but I may not be entirely human.