Superoxides refer to a class of chemical compounds that contain the superoxide anion, which is a negatively charged molecule with the chemical formula O2-. Other synonyms for superoxides include peroxides, reactive oxygen species, and radical oxygen species. Superoxides are highly reactive and can cause damage to cells by promoting the formation of free radicals, which can lead to oxidative stress. Some common superoxides include hydrogen peroxide, ozone, and nitric oxide. In addition to their negative effects on cells, superoxides also have potential therapeutic uses and may be involved in certain biological processes such as apoptosis and immune responses.