The effects of L carnitine supplementation on lipid profiles in adults: A systematic review and dose response meta analysis ScienceDirect L Carnitine Liquid Benefits Explained: A Guide The Science of Good Health Glycine Propionyl L Carnitine & ED : Benefits, Effects & Uses Allo Health Blog 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 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 L Carnitine Benefits, Uses, Dosage, Foods, Side Effects Dr. Axe