L Carnitine For Fatty Liver [NAFLD] Does It Help? Andy The RD Comparison of short term and long term effects of peroral L carnitine intake: clinical implications of elevated TMAO levels in cardiovascular complications 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 Ornithine L Aspartate The Role of l Carnitine in Mitochondria, Prevention of Metabolic Inflexibility and Disease Initiation