Supports muscle growth, improves strength and endurance, and aids in faster recovery for optimal performance and physique development. Acetyl L Carnitine Powder: Optimize Brain Health and Energy with ALCAR Supplement NutraKey Health Acetyl L Carnitine 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