AS-IT-IS Nutrition L-Carnitine L-Tartrate (Energy & Performance) Powder converts fats into energy at the cellular level. This gives you an additional boost of energy. L-Carnitine has an essential role in transporting fat into mitochondria (the furnace of the cell). It has antioxidant and vasoactive (promotes dilation) effects which boosts recovery after exercise. It is effective at reducing the acute response of several markers of biochemical stress after resistance exercise. By taking L-carnitine, athletes can also rely not only on their carbohydrates but also on their body fat as fuel. This gives an additional boost of energy in intense workouts.