L Carnitine. Boost Weight Loss & Improve Heart Health 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. LCarnitine Effects Liver Enzymes Consensus The effects of L carnitine supplementation on lipid profiles in adults: A systematic review and dose response meta analysis ScienceDirect L Carnitine L Tartrate: 8 Key Benefits Dr. Lam 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.