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 History of L carnitine: Implications for renal disease Journal of Renal Nutrition L Carnitine Benefits for Fat Burning and How to Use ICONFIT Summary of studies on oral L carnitine treatment in end stage renal Download Scientific Diagram