 metal oxide nanoparticles are gaining increasing attention due to their potential use as antibacterial agents. Metal oxides such as Fe3O4, TiO2, CuO, and ZNO have been shown to be effective against a variety of bacteria, while polymetallic oxides may offer additional benefits through synergistic effects. Despite the promising results, however, there remain challenges associated with the practical applications of metal oxide nanoparticles, including cytotoxicity. Polymetallic oxides may offer a solution to this problem, as they combine the best features of individual metal oxides, resulting in stronger antibacterial effects without the risk of cytotoxicity. This article was authored by Slavika Stankik, Tniha Suman, Fransya Hub, and others.