L Carnitine: What Is It, When To Take It, and More Knowledge Bioway Organic Understanding the Benefits and Uses of Carnitine in Health and Fitness Fitness Health 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 Carnitine: the claims and why it may not work L Carnitine L Tartrate 99% Pure Powder for Fat Loss