Paraxanthine Improves Markers of Cognition and Memory in Animal Study Nutraceuticals World Glutathione Peroxidase: An Antioxidant Enzyme In Health And Disease A purine derivative, paraxanthine, promotes cysteine uptake for glutathione synthesis ScienceDirect Microbial Antioxidative Enzymes: Biotechnological Production and Environmental and Biomedical Applications Applied Biochemistry and Microbiology Springer Nature Link New Preclinical Study Shows Paraxanthine Enhances Memory and Brain Function Better Than Caffeine A purine derivative, paraxanthine, promotes cysteine uptake for glutathione synthesis ScienceDirect