Bigmuscles Nutrition Carnicut 1500 Mg 450 Ml Blue Raspberry Ice Pack Of 2 Should I Take Acetyl L Carnitine or L Carnitine HealthAid 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 GNC Total Lean Triple Stength L Carnitine Liquid Fruit Punch GNC Acetyl L Carnitine Tablets NOW Foods Source Naturals Acetyl L Carnitine Tablets 500mg, 60 ct Smith's Food and Drug