L Carnitine: Benefits, Side Effects, And Dosage, Per Dietitians Do You Need to Cycle Creatine for Optimal Muscle Growth? VPA Australia 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: Benefits, side effects, and dosage Effects of creatine on the body: Explore this secret ingredient NAKPRO NUTRITION