 Bacillus coagulans supernatant-produced copper oxide nanoparticles, BCCUNPs, have been found to possess strong anticancer capabilities. These nanoparticles are composed of copper oxides, and have been shown to induce apoptosis in both MCF7 and SKBR3 breast cancer cells. Additionally, they have been observed to inhibit the proliferation of these cells by arresting them in the G1 phase of the cell cycle. Furthermore, BCCUNPs have been shown to reduce the expression of genes associated with chimorrhogesis, such as CCND1 and CDK4, which suggests that this type of nanoparticle may be effective at preventing the spread of cancer. This article was authored by Massomema de Lahti, Farzane Tafisi, Massoud Salehyper, and others.