L Carnitine for Fat Loss: The Science Backed Secret to Shredding Safely Optimizing Sleep for Better Performance & Quality of Life Life Extension ? That was me I don't know if it's age or just life, but lately I've been feeling tired all the timeeven during 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.