L Carnitine What Is It? Benefits, Dosage & When To Take MYPROTEIN L Carnitine500, 500 mg, 120 Capsules L Carnitine: Benefits, Side Effects, FAQ, Sources, and Dosage 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 Supplements don't replace the workbut they can support it L Carnitine helps your body turn fat into usable energy, so you can push harder and recover better. Consistency first. Supplements second. Results