L Carnitine for Weight Loss: My Honest Experience & How It Burns Fat 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 kidney support L CARNITINE 510mg amino acids muscle growth 2 Bottles eBay 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 Medium chain fatty acid oxidation is independent of l carnitine in liver and kidney but not in heart and skeletal muscle American Journal of Physiology Gastrointestinal and Liver Physiology American Physiological Society