L Carnitine L Carnitine: Benefits, Side Effects, and Dosage Ultimate Sup L Carnitine: Benefits, Uses, Side Effects, and More Acetyl L Carnitine (ALCAR) Supplement for Horses Mad Barn Understanding the Role of Carnitine in TPN and IDPN Therapy 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