L Carnitine 500 mg Energy & Fat Metabolism Support* NOW Foods Optimum Nutrition L carnitine 500 mg 60 ( ) Ronnie Coleman L Carnitine XS 4000, Orange Creamsicle, 15.72 fl oz (465 ml) : Target Optimum Nutrition L Carnitine 500 Tabs, 60 tablets Shopee Malaysia Optimum Nutrition L Carnitine 500 mg 60 500 MG OF PURE L CARNITINE, L carnitine is synthesized from the essential amino acids lysine and methionine. Because approximately 98% of the body'S L carnitine supply is found in muscle mass, and the