L Carnitine, 500 mg Veggie Capsules Jarrow Formulas L Carnitine, 500 mg Veggie Capsules Jarrow Formulas 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 Concentration & focus Home Jarrow Formulas Acetyl L Carnitine 500 mg at Plaza Las Americas in San Juan, PR