Systemic regulation of L carnitine in nutritional metabolism in zebrafish, Danio rerio Scientific Reports If you are like a lot of people, you may have never heard of carnitine but this important nutrient is critical for our body's ability to optimally burn fat required for energy. The Role of l Carnitine in Mitochondria, Prevention of Metabolic Inflexibility and Disease Initiation Effect of L carnitine on quality of life in covert hepatic encephalopathy: a randomized, double blind, placebo controlled study