ALCAR Acetyl L Carnitine for Cognitive Support AOR Inc. Sports Performance Bulletin Other L carnitine: back on the block Bronson Acetyl L Carnitine 500 mg Vitamins & Supplements Bronson Vitamins Bronson Vitamins Quality Vitamins and Supplements since 1960 L carnitine is a naturally occurring amino acid structure that is made in the human brain, liver, and kidneys. L carnitine plays a critical role in energy production, as it converts fat into energy. Comprehensive review of the expanding roles of the carnitine pool in metabolic physiology: beyond fatty acid oxidation Journal of Translational Medicine Springer Nature Link