Products in this category aim to stimulate nitric oxide (NO), which causes blood vessel dilation and, consequently, muscle pump. The increased blood flow resulting from vasodilation allows for faster and denser delivery of substances to the muscles that are necessary for strength and growth. However, it is important to note that muscle pump itself does not have anabolic effects. Therefore, these products often contain ingredients that stimulate NO, as well as substances that promote muscle volume and strength, such as amino acids, proteins, carbohydrates, or creatine.