L Carnitine and Sleep: Does It Affect Rest or Sleep Quality? Yes, L Carnitine works best once you take it before exercising and when you have calories to burn., But, it works just as well when you take it before sleeping., Get yours now! , L Carnitine Liquid When Should You Take L Carnitine? MuscleTech Liquid Gold: 5 Benefits of Liquid Carnitine You Can't Ignore NutraBio Brands L Carnitine as Pre Workout Supplement: Guide The Science of Good Health L Carnitine: Benefits, Side Effects, FAQ, Sources, and Dosage