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 PDF) The Importance of the Fatty Acid Transporter L Carnitine in Non Alcoholic Fatty Liver Disease (NAFLD) L Carnitine Liquid, Citrus Flavor 1000 mg, 16 oz. NOW Foods Fruitful Yield Happy Supplement Sunday! Each of the supplements displayed in today's graphic have some scientific evidence supporting a benefit on liver enzyme (and potentially other markers) levels in people living with a fatty