Frontiers Role of Carnitine in Non alcoholic Fatty Liver Disease and Other Related Diseases: An Update Systemic regulation of L carnitine in nutritional metabolism in zebrafish, Danio rerio Scientific Reports Systemic regulation of L carnitine in nutritional metabolism in zebrafish, Danio rerio Scientific Reports 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