Now Foods L Carnitine 1000 Mg (Carnipure L Carnitine Tartrate) 100 Tab L Carnitine: What Is It, When To Take It, and More Knowledge Bioway Organic L Carnitine contents in foods (modified from [70]). Download Scientific Diagram 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 Carnitine: Top 3 Anti Aging Benefits of This Super Nutrient