Supercoiling affects the accessibility of glutathione to DNA bound molecules: Positive supercoiling inhibits calicheamicin induced DNA damage PNAS A needle free NAD+ + glutathione system using iontophoresis technology. NAD+ is essential for healthy aging it supports your mitochondria, helps repair DNA, and keeps your cells functioning Comprehensive Transcriptome Profiling of Antioxidant Activities by Glutathione in Human HepG2 Cells Inhibition of glutathione synthesis in brain endothelial cells lengthens S phase transit time in the cell cycle: Implications for proliferation in recovery from oxidative stress and endothelial cell damage ScienceDirect