Amazon.com: Life Extension Creatine Acetyl L Carnitine Energy Plus, Energy Support Supplement, creatine monohydrate, Acetyl L carnitine, Gluten Free, Non GMO, Vegetarian, 30 Servings : Health & Household When to take L carnitine: Dosage, forms, and side effects Liquid Gold: 5 Benefits of Liquid Carnitine You Can't Ignore NutraBio Brands Taking a preworkout AND carnitine? It is important to get the timing of each supplement right to get the best results with both. Watch as Phil explains the best way to combine them. , #preworkout