Clinical Effects of L Carnitine Supplementation on Physical Performance in Healthy Subjects, the Key to Success in Rehabilitation: A Systematic Review and Meta Analysis from the Rehabilitation Point of View Research Science Update L Carnitine L Tartrate Supplementation Impr Prosource 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 L Carnitine Uses & Benefits Explained: A Complete Guide The Science of Good Health