Someone in another thread posted a link to this https://www.sciencedirect.com/science/article/pii/S0022202X1542127X and said that zinc inhibits 5ar1 while copper block 5ar2 so copper should be a better option. Though I'm unsure if anyone's already tested something similar to zix but with copper instead.
You can just add copper to the mix
It's probably going to cost you 5 bucks extra
Copper peptides (Tricomin, Folligen) have been around forever. Results have been underwhelming. Stick with Zix.