Frontiers Glutathione and selenium nanoparticles have a synergistic protective effect during cryopreservation of bull semen Glutathione improves testicular spermatogenesis through inhibiting oxidative stress, mitochondrial damage, and apoptosis induced by copper deposition in mice with Wilson disease ScienceDirect Glutathione improves testicular spermatogenesis through inhibiting oxidative stress, mitochondrial damage, and apoptosis induced by copper deposition in mice with Wilson disease ScienceDirect Green tea consumption increases sperm concentration and viability in male rats and is safe for reproductive, liver and kidney health Scientific Reports