I've been looking for safer chelators of zinc in plants specially polyphenols / flavonoids to replace quercetin /hydroxycholochline which has some side effects in some people when fighting COVID19. It acts to increase zinc and stop viral replication.
I think I may have cracked the code: epicatechin gallate acts as antioxidants and signaling molecule and chelator of zinc. In other words drink lots of green tea and take a little bit of zinc in your diet:
Possibly this is a big discovery. I am not a doctor, I am a scientist so consult