Science The antioxidant glutathione plays a key role in protein folding The team discovered a few years ago that if glutathione levels aren't precisely maintained in mitochondria, all systems fail. On What is Glutathione? GoldBio 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 Glutathione Amino Acids: Why Supplements May Not Work Antioxidant glutathione discovered to play a key role in proper protein folding