Levocarnitine, commonly known as L Carnitine, is a naturally occurring compound that the body produces from the amino acids lysine and methionine. It plays a critical role in energy production by transporting fatty Losing weight with L carnitine supplements. Yes or no? Amazon.com: Best Naturals Acetyl L Carnitine 500 Mg & L Lysine 500 mg : Health & Household Lysine: Sources, Metabolism, Physiological Importance, and Use as a Supplement L Carnitine for PCOS: Everything You Need to Know PCOS Nutrition Center