Brain Support Supplement Jarrow Formulas Acetyl L Carnitine 500mg Brain & Energy Support Supplement, Antioxidant 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 Amazon.com: Jarrow Formulas Acetyl L Carnitine 500 mg, Dietary Supplement, Amino Acid Support for Brain Health and Antioxidants, 120 Veggie Capsules, 120 Day Supply : Health & Household Acetyl L Carnitine (Jarrow Formulas)