The Role of l Carnitine in Mitochondria, Prevention of Metabolic Inflexibility and Disease Initiation 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. Acetyl L Carnitine (500mg) (100 capsules) Arthritis Center of Riverside Acetyl L Carnitine (500 mg) Acetyl L Carnitine 500 mg Natural Wellness Corner