History of L carnitine: Implications for renal disease Journal of Renal Nutrition Carnitine Wikipedia NKF KDOQI Guidelines Bronson Acetyl L Carnitine 500 mg Vitamins & Supplements Bronson Vitamins Bronson Vitamins Quality Vitamins and Supplements since 1960 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.