Carnitine and Acetyl L Carnitine. Differences, functions and method of use L Carnitine and Creatine are both game changers for fitness, but they each shine in different ways! SAVE this as your quick guide! L Carnitine, found in red meat, fish, and chicken, supports fat Amazon.com: Designs for Health Acetyl L Carnitine Capsules 800mg Energizing Brain Support Non GMO, Vegetarian Acetyl L Carnitine HCl Supplement (90 Capsules) : Health & Household Acetyl L Carnitine, 120 Veggie Caps (500 mg per Cap)