Longer Lifespans and Better Health with Glutathione: Taking the Confusion Out of the Master Antioxidant WholeFoods Magazine Cellular Stress Responses, The Hormesis Paradigm, and Vitagenes: Novel Targets for Therapeutic Intervention in Neurodegenerative Disorders Vittorio Calabrese, Carolin Cornelius, Albena T. Dinkova Kostova, Edward J. Calabrese, Mark P. Mattson, 2010 A purine derivative, paraxanthine, promotes cysteine uptake for glutathione synthesis ScienceDirect Paraxanthine Improves Markers of Cognition and Memory in Animal Study Nutraceuticals World Paraxanthine, a compound your body creates when it breaks down caffeine, is being touted by some as a better alternative to coffee, offering energy and focus without the jitters. Click the link