Pro Carnitin What is the recommended duration of carnitine (L carnitine) supplementation? Understanding the Role of Carnitine in TPN and IDPN Therapy Gua de Dosificacin y Uso de L Carnitina Lquida L Carnitine: Benefits, Side Effects, And Dosage, Per Dietitians 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