Shown to Fuel Metabolism 3,000 mg Per Serving Stimulant Free Natural Flavors Dietary Supplement L-Carnitine: The Science L-Carnitine is an amino acid that has been shown to help facilitate the transfer of fatty acids into the mitochondria of cells for energy production. Not only does this naturally occurring amino acid help with fat metabolism and energy, but it has also been shown to reduce muscle fatigue. Promotes healthy body composition by transporting fats into mitochondria for energy production. Shown to enhance athletic performance and endurance. Reduces depletion of muscle glycogen & lactic acid accumulation.