L Carnitine contents in foods (modified from [70]). Download Scientific Diagram Source Naturals L Carnitine Capsules 250mg, 120 ct Smith's Food and Drug 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 L Carnitine Supplement Liquid L Carnitine 1000mg NOW NOW L Carnitine 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