Carnitine: the claims and why it may not work L Carnitine Tablets NOW Foods Amino Acids 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 Vitamin L Carnitine Healthy Nutrient Rich Food Vector Illustration Stock Vector Illustration of food, organic: 187983218 L Carnitine Liquid 3000 mg, 16 oz. NOW Foods Fruitful Yield L carnitine known as the energy nutrients, provides massive benefits to your heart and works best with Alpha Lipoic Acid.