Dr Acetyl l carnitine has been compared to placebo treatments. It's also been compared to standard antidepressants. Most of those studies lead to the conclusion that acetyl l carnitine works like Acetyl L carnitine Cellular energy Life Extension Europe Amazon.com: EVL L Carnitine Supplement for Weight Loss Support L Carnitine Tartrate for Cellular Energy Focus Endurance and Fat Burning Support Stimulant Free Amino Acid for Fat Metabolism (120 Servings) : Acetyl L Carnitine HCl, 500 mg, 300 Capsules L Carnitine 3000 Liquid