Glutathione is a small protein made of three amino acids. It is often called the master antioxidant because it helps regenerate other antioxidants like vitamin C and vitamin E. Key Benefits Glutathione + Vitamin C RegenaLife Market Figure 3 from An Overview of Ascorbic Acid Biochemistry Askorbk Ast Byokmyasina Br Baki Semantic Scholar Antioxidant Green Factories: Toward Sustainable Production of Vitamin E in Plant In Vitro Cultures ACS Omega