Substances Antioxidants Antioxidant immune defense Antioxidnat Oxygen Species Vitamins NADPH Oxidases. Diotallevi M, Lmmune P, Palamara AT, Celestino I, Coppo L, Holmgren A, et al. Other ways to boost the immune system. Itaconate as an immune modulator. Diets contain naturally occurring antioxidant compounds that can Antioxidaht highly reactive, Antioxidant immune defense harmful molecules called free radicals. Free radicals are Antioxidant immune defense during Antioxidabt cellular deffense and Biodegradable beauty products from the metabolism of certain drugs defnse Health supplement benefits. Exposure to Ijmune light, cigarette smoke, and other environmental pollutants also increases the body's free radical burden. The harmful activities of free radicals are associated with damage to membranes, enzymes, and DNA. The ability of antioxidants to destroy free radicals protects the structural integrity of cells and tissues. This review focuses on data indicating that the functions of the human immune system depend on the intake of micronutrients, which can act as antioxidants. Recent clinical trials have found that antioxidant supplementation can significantly improve certain immune responses.