L-carnitine L-tartrateis a dietary supplement containing the levo-enantiomers of carnitine and tartrate with potential chemoprotective and antioxidant activities. L-carnitine L-tartrate increases fatty acid oxidation and reduces purine catabolism and free radical formation, which may prevent exercise fatigue, muscle weakness, chemotherapy-induced peripheral neuropathy, and hyperlipoproteinemia. It can cause side effects such as stomach upset, heartburn, diarrhea, and seizures