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 The adverse effects of long term l carnitine supplementation on liver and kidney function in rats L Liu, D M Zhang, M X Wang, C Y Fan, F Zhou, S J Wang, L D Kong, 2015 Frontiers Publishing Partnerships Drug abuse results in metabolic and epigenetic changes in body which may contribute to disease risk: Role of L carnitine and nutrients L Carnitine Benefits, Uses, Dosage, Foods, Side Effects Dr. Axe Graphic representation of the effects of rifaximin and L carnitine on Download Scientific Diagram Acetyl L Carnitine: Benefits, Forms, Dosing, and Side Effects Dr Brad Stanfield