L Carnitine Is it Worth Taking? Ideal Nutrition Branched chain amino acids and l carnitine attenuate lipotoxic hepatocellular damage in rat cirrhotic liver ScienceDirect 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 L Carnitine Linus Pauling Institute Oregon State University LC25 Agritech IS L carnitine for all poultry to improve energy 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