Oxidation – increases the atom’s valence with the loss of a hydrogen ion or one or more electrons. Oxidation reactions commonly involve the combination with oxygen free radicals, and result in major organ damage that accumulates with time; they are implicated in age-related damage, degenerative phenomena and cancer, and may be ameliorated with antioxidants, including vitamin C, vitamin E, glutathione and superoxide dismutase.
Source: https://medical-dictionary.thefreedictionary.com/oxidation
