What Is Carnitine and Why Is It Important? The Amino Company Acetyl L Carnitine Supplement: Uses, Benefits, Side Effects, Dosage, A Welltopia Pharmacy Herbal max L Glutathione Tablet for Youthful Skin Brightening, Skin Moisturizing for Men & women, Skin 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