L Carnitine as Pre Workout Supplement: Guide The Science of Good Health I get asked so many questions about my pre workout combo, so here it is! I take Oxyshred + Acetyl L Carnitine. This combo gives me the energy I need to crush my workouts Liquid L Carnitine 3000 Nutrex Amino Acids L Carnitine 2175mg per serving 200 Capsules Snap Supplements L Carnitine Amino Acid Preworkout Energy, Recovery, 500mg (60 Gummies)