Fat Metabolizer Nitro L-Carnitine Plus is a superior, patented combination of L-carnitine and magnesium. Studies have shown this special combination can help enhance exercise performance, increase fat burning and improve recovery. L-carnitine is required to transport fats into the cells so they can be burned for energy. Nitro L-Carnitine Plus Performance Enhanced Formula helps the body generate energy more efficiently than regular L-carnitine because magnesium is vital for proper carbohydrate metabolism as well. Nitro L-Carnitine Plus further helps improve endurance and enhance recovery by inhibiting lactic acid buildup in the muscles. It also helps prevent another major cause of muscle fatigue, oxygen deficiency in the muscle tissue. It is the only L-carnitine that can be taken with food.