Sacramento Glutathione (GSH) is a crucial endogenous "master" antioxidant that protects the heart by reducing oxidative stress, neutralizing lipid peroxides, and preventing cell death. Low glutathione levels are consistently found in L Glutathione Ingredient Guide Time Health Do You Know About The Master Antioxidant? Dr. Shel Wellness & Aesthetic Center Glutathione, the powerhouse antioxidant, is taking center stage in today's health and wellness scene. Known as the body's 'master antioxidant,' it helps neutralize free radicals, detoxifies, and supports a healthy immune system.