Creatine and L Carnitine: Complementary Roles in Energy Metabolism Supps247 L Carnitine for Erectile Dysfunction: What the Evidence Shows and How to Use It L Carnitine, 500 mg, 120 Quick Release Capsules, 2 Bottles 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