Frontiers Lcarnitine in metabolic dysfunction associated steatotic liver disease: mechanisms and therapeutic potential Systemic regulation of L carnitine in nutritional metabolism in zebrafish, Danio rerio Scientific Reports Effect of l carnitine supplementation on lead acetate induced liver cell apoptosis and inflammation: role of caspase 3 and glycogen synthase kinase 3 enzymes ScienceDirect 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