L Carnitine food supplement molecule Stock Image Science Source Images Source Naturals Acetyl L Carnitine & Alpha Lipoic Acid 650 mg 60 Tablets Vitacost A Beginner's Guide to L Carnitine Wonder Paws Source Naturals Acetyl L Carnitine, 500 mg, Tablets 30 count Ingredient Spotlight: L Carnitine Source: Biosynthesised in the body from the amino acids Lysine and Methionine, L Carnitine is a conditionally essential nutrient involved in energy metabolism and fat transport. Key Benefits