6 potential benefits of l carnitine Good Food 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. Acetyl L Carnitine Powder Acetyl Carnitine Powder Online The bright and the dark sides of L carnitine supplementation: a systematic review Journal of the International Society of Sports Nutrition Springer Nature Link Cutler Nutrition Liquid L Carnitine Blue Sharks flavor is a bold, refreshing taste that delivers fat burning support and energy metabolism benefits. Zero sugar. Zero calories. Pure flavor and results. Shop now at JayCutler.com