Catalase and Glutathione Peroxidase Are Equally Active in Detoxification of Hydrogen Peroxide in Human Erythrocytes ScienceDirect Measurement of superoxide dismutase, catalase and glutathione peroxidase in cultured cells and tissue Nature Protocols New Preclinical Study Shows Paraxanthine Enhances Memory and Brain Function Better Than Caffeine 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