Nanoparticle mediated L carnitine delivery for improved male fertility ScienceDirect Role of L carnitine in female infertility Reproductive Biology and Endocrinology Springer Nature Link Acetyl L Carnitine: Benefits, Forms, Dosing, and Side Effects Dr Brad Stanfield 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