Lcarnitine Food Supplement Molecule High Res Vector Graphic Getty Images NOW Foods L Carnitine Pure Powder 3 oz DailyVita 10 Best Foods Rich in L Carnitine 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 High Potency Acetyl L Carnitine Supplements for Food Energy & Memory (100 caps)