L carnitine containing Food Groups Healthy Products Containing Stock Vector (Royalty Free) 2219112733 Shutterstock 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 Carnitine: Requirements, food sources, benefits, and risks NOW Foods L Carnitine Liquid with Vitamin B12 Support Swanson Vitamins