Functional differences between l and d carnitine in metabolic regulation evaluated using a low carnitine Nile tilapia model British Journal of Nutrition Cambridge Core Difference between L Carnitine and L Carnitine L Tartrate 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. Does L Carnitine help manage hyperthyroidism symptoms? Consensus Carnitine, Acylcarnitines and Beta Oxidation