Displaying 1 results of Paraxanthine Impurities Paraxanthine is a metabolite of caffeine that can be found in the bloodstream after consuming caffeine. However, during the manufacturing process of caffeine, certain impurities may arise, including paraxanthine impurities. These impurities can affect the purity and potency of the caffeine, leading to potential health concerns for consumers. Therefore, it is important for manufacturers to monitor and control the levels of paraxanthine impurities in caffeine products.