L Carnitine L Tartrate: 8 Key Benefits Dr. Lam If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy. L carnitine is a naturally occurring amino acid structure that is made in the human brain, liver, and kidneys. L carnitine plays a critical role in energy production, as it converts fat into energy. Revisiting the Role of Carnitine in Heart Disease Through the Lens of the Gut Microbiota Force Factor L Carnitine Liquid Orange 3 000 mg 16 fl oz (473 ml) Macy's