L Carnitine Linus Pauling Institute Oregon State University 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 Benefits of L Carnitine (especially for fitness enthusiasts):, Fat Metabolism Helps transport fatty acids into the mitochondria to be burned for energy., Improved Exercise Performance May enhance Acetyl L Carnitine