L Carnitine Tartrate L Carnitine Liquid Force Factor Early research into L carnitine was often cited as underwhelming, showing negligible changes in muscle carnitine content and fat loss outcomes. However, these findings may have been limited by a short study window Carnitine C7H15NO3 CID 10917 PubChem The bright and the dark sides of L carnitine supplementation: a systematic review Journal of the International Society of Sports Nutrition Springer Nature Link L Carnitine L Tartrate: 8 Key Benefits Dr. Lam