Displaying 31 results of Carnitine Impurities Carnitine is a naturally occurring amino acid derivative that plays a crucial role in energy metabolism. However, during the manufacturing process of carnitine, impurities can be introduced. These impurities can potentially harm consumers, causing adverse effects such as nausea, vomiting, and diarrhea. Therefore, it is important for manufacturers to ensure that their carnitine products are free of impurities to ensure the safety and efficacy of their products.