Effect of melatonin and zinc oxide nanoparticles against oxidative stress and male reproductive toxicity induced by cyclophosphamide Reproductive and Developmental Medicine Enhancement of sweetpotato tolerance to chromium stress through melatonin and glutathione: Insights into photosynthetic efficiency, oxidative defense, and growth parameters ScienceDirect Glutathione is often called the master antioxidant But it's actually regulated by melatonin (PMID: 20868358) Melatonin has been seen to have 10x the antioxidant capacity than glutathione Besides sleep, melatonin also regulates Acetyl Glutathione 300 mg