History of L carnitine: Implications for renal disease Journal of Renal Nutrition 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 Are L Carnitine and L Carnosine the Same? Anti Aging Systems 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 6 potential benefits of l carnitine Good Food kidney support L CARNITINE 510mg amino acids muscle growth 2 Bottles eBay