L Carnitine, 500 mg, 100 Veggie Capsules L Carnitine is an amino acid found in high concentrations in muscle, heart, and liver tissues. Inside the cells, L Carnitine transports fatty acids into the mitochondria for energy production (i.e., ATP) and reduces Brain Support Supplement Jarrow Formulas Acetyl L Carnitine 500mg Brain & Energy Support Supplement, Antioxidant Jarrow Formulas ALCAR Jarrow Formulas Acetyl L Carnitine 500mg Brain & Antioxidant Support, 14cm Bottle