One lab marker could reveal your risk for heart disease, brain decline, and poor detoxand most people have never heard of it. How Common is Heart Disease in Diabetes? Heart Disease and Diabetes Do You Have a Glutathione Deficiency? Meet your body's master antioxidant Glutathione Antioxidants protect our cells against free radicals, reducing oxidative stress linked to cancer, heart disease, and aging. Whether you're pushing your performance, dialing in Benefits of Glutathione." Glutathione is a compound involved as a coenzyme in oxidationreduction reactions in cells. It is a tripeptide derived from 3 amino acids: Cysteine, glutamate (from glutamic acid), and glycine.