Liquid L Carnitine 3500MG Boost Your Energy Naturally Ripped Up Nutrition L Carnitine Benefits, Uses, Dosage, Foods, Side Effects Dr. Axe What is L Carnitine? L Carnitine is a naturally occurring amino acid derivative that the human body can synthesize itself. It is mainly found in red meat and dairy products. [1] Core Benefits of Foods High in L Carnitine for Energy and Health Marnys L Carnitine contents in foods (modified from [70]). Download Scientific Diagram