Role of L carnitine in exercise training: Anti inflammatory, antioxidant, and metabolic interactions ScienceDirect L Carnitine L Tartrate Capsules Get Fit & Tone Up L carnitine helps transport fatty acids into your cells' mitochondria, where they can be used for energy. That's why it's often marketed for fat loss and energy support. Common use: People usually take L Carnitine Benefits for Fat Burning and How to Use ICONFIT