Understanding the Benefits and Uses of Carnitine in Health and Fitness Fitness Health The Role of L Carnitine in Kidney Disease and Related Metabolic Dysfunctions Essential L Carnitine Optimal Health Systems Carnitine Deficiency: What Is It, Causes, Symptoms, and More Osmosis l Carnitine pretreatment ameliorates heat stress induced acute kidney injury by restoring mitochondrial function of tubular cells American Journal of Physiology Renal Physiology American Physiological Society 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.