Best Time to Take L Carnitine: Morning vs Evening for Better Fat Loss & Performance Does anyone recommend any good pre workout L carnitine liquid supplements that gives you a massive pump during workouts and a good energy boost When to Take L Carnitine for Optimal Training Benefits Transparent Labs Snap Supplements L Carnitine Amino Acid Preworkout Energy, Recovery, 500mg (60 Gummies) Oxyenergys L Carnitine. My go to pre post workout supplement. Pre workout I usually take it before my workout session for energy production. Post workout Ill take it the day after my workout Saw Palmetto Vegavero L Carnitine Supplement Vegan Pre Workout With Choline, Chromium & Green Coffee Extract, 120 Caps