Deoxidizer is a term used to refer to a substance that helps eliminate oxygen from a specific system, environment or chemical reaction. Synonyms for deoxidizer include reducant, reducing agent, antioxidant, reducing substance, and chemical reducing agent. These synonyms share similar properties which enable them to perform the function of eliminating oxygen by donating electrons or producing hydrogen gas when combined with water or an acid. Antioxidants, for instance, are used to inhibit the oxidation process, which prevents or slows down the formation of free radicals and other reactive oxygen species that damage cells. Reducing agents, on the other hand, are used in various industrial processes including refining metals to reduce their oxides.