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 Losing weight with L carnitine supplements. Yes or no? Effect of Acute and Chronic Oral l Carnitine Supplementation on Exercise Performance Based on the Exercise Intensity: A Systematic Review L Carnitine for weight loss is and heres why. There is zero published scientific data to support that L Carnitine actually helps you lose body fat. I went ahead and purchased the meta analysis