Role of L carnitine in exercise training: Anti inflammatory, antioxidant, and metabolic interactions ScienceDirect l Carnitine improved insulin resistance of aging adipose tissue. a Download Scientific Diagram L carnitine is a naturally occurring amino acid structure that is made in the human brain, liver, and kidneys. L carnitine plays a critical role in energy production, as it converts fat into energy. Carnitine supplementation improves metabolic flexibility and skeletal muscle acetylcarnitine formation in volunteers with impaired glucose tolerance: A randomised controlled trial eBioMedicine The carnitine system and cancer metabolic plasticity Cell Death & Disease The glycemic, cholesterol, and weight effects of L carnitine in diabetes: A systematic review and meta analysis of randomized controlled trials ScienceDirect