Hydrogen Water vs. Glutathione Reductase (GR): Which Is Better? Evolved H2O Science Time Glutathione Glutathione is a tri peptide, a small protein consisting of three amino acids, that functions as a principle antioxidant, scavenging free radicals and toxins that would otherwise damage and Glutaredoxin catalysis requires two distinct glutathione interaction sites Nature Communications What is Glutathione? GoldBio