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 Amino Acids for Super Humans, Part IV Purported Ergogenics (2 3): L Carnitine, ALCAR, LCLT, GPLC & Co. L Carnitine Supplement Liquid L Carnitine 1000mg NOW Now Foods L Carnitine 1000 Mg (Carnipure L Carnitine Tartrate) 100 Tab NHS Arnitine M L Carnitine L Taurine Glutatione L Arginine Co Q 10 90 Tablets L Carnitine contents in foods (modified from [70]). Download Scientific Diagram