L Carnitine 500 mg Energy & Fat Metabolism Support* NOW Foods L Carnitine NOW Foods L Carnitine Liquid with Vitamin B12 Support Swanson Vitamins When to Take L Carnitine for Weight Loss & Maximize Results 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 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