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 A Beginner's Guide to L Carnitine Wonder Paws L Carnitine Veg Capsules NOW Foods Amino Acids L carnitine containing food. Groups of healthy products containing vitamins and minerals. Set of fruits, vegetables, meats, fish and dairy Stock Vector Image & Art Alamy What Foods Are High in Carnitine? Deficiency Side Effects