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 NuSci Acetyl L Carnitine Pure Powder ALC 100g (3.52 oz) cognition eBay Acetyl L Carnitine HCL 500mg per serving 180 Capsules 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