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 JCI l Carnitine in omnivorous diets induces an atherogenic gut microbial pathway in humans History of L carnitine: Implications for renal disease Journal of Renal Nutrition NKF KDOQI Guidelines Practice recommendations for the use of L Carnitine in dialysis related carnitine disorder National Kidney Foundation Carnitine Consensus Conference ScienceDirect kidney support L CARNITINE 510mg amino acids muscle growth 2 Bottles eBay