Glutathione metabolism. In the presence of an amino acid glutathione is Download Scientific Diagram GLUTATHIONEPathway for the biosynthesis of glutathione ** Glutathione is the body's most important antioxidant. Glutathione is made by the coming together chemically of three amino acids. The "Transmethylation Pathway" starts with Homocysteine Glutathione: The Bodys Master Antioxidant, ., ., Glutathione (GSH) is often referred to by scientists and nutritionists as the "Master Antioxidant." Unlike other antioxidants like Vitamin C or E, Dog Safe Snacks: What Foods Are Rich in Glutathione? Earth Buddy Pet Glutathione the master Antioxidant