Nutricost L Carnitine Tartrate Supplement, 240 Capsules, 500mg, 1000mg per Serving Walmart.com 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 Vitamin Supplement for Energy and Metabolism Boost Carnitine Rich Foods: Understanding L Carnitine and Its Benefits Loyal What even is carnitine?? Carnitine is a "conditionally" essential amino acid that becomes essential during pregnancy. What does this mean? You must get carnitine through food! The best sources are red Source Naturals L Carnitine Capsules 250mg, 120 ct Smith's Food and Drug