Glutathione improves testicular spermatogenesis through inhibiting oxidative stress, mitochondrial damage, and apoptosis induced by copper deposition in mice with Wilson disease ScienceDirect Glutathione Peroxidase 5 Is Expressed by the Entire Pig Male Genital Tract and Once in the Seminal Plasma Contributes to Sperm Survival and In Vivo Fertility PLOS One Doctor Recommended Fertility Supplement Kit Binto FDA highlights concerns with using dietary ingredient glutathione to compound sterile injectables FDA