Oxidized copper has actually shown*increased* anti microbial activity in some studies IIRC. Also this https://www.sciencedirect.com/science/article/pii/S0010938X17313963
Oxidized copper has actually shown*increased* anti microbial activity in some studies IIRC. Also this https://www.sciencedirect.com/science/article/pii/S0010938X17313963