Semen naturally contains antioxidants to prevent cell damage due to chain reactions involving unpaired Sperm., Semen contain two main antioxidants such as enzymatic antioxidants and glutathione The Stallion Spermatozoa: A Valuable Model to Help Understand the Interplay Between Metabolism and Redox (De)regulation in Sperm Cells Fernando J. Pea, Cristian O'Flaherty, Jos M. Ortiz Rodrguez, Francisco E. Martn CountBoost for Men Male Fertility Supplement to Liberia Ubuy Exploring the characters of sperm lipid peroxidation, enzymatic antioxidant activity, and spermatozoa zona binding capacity with aging in dogs Scientific Reports Seattle Glutathione Injections for Fertility Changes in Sperm Glutathione and Glutathione Redox States Correlate to Poor Sperm Qualitative Measures