NO-Xs is a special formula containing arginine alpha-ketoglutarate (A-AAKG) and arginine ketoisocaproate (A-KIC) combined into one compound that strengthens the contribution of each component, affecting the dispersion of nitric oxide throughout the body, increasing the vessels’ clearance, affecting muscle cells better blood circulation and improve blood surface. In the sports supplements they are used in the period of increased strength and endurance training, due to the oxygen metabolism and post-workout regeneration of the body and transport of nutrients (such as glucose). The lactic acid is excreted faster of the organism, which is produced in the anaerobic metabolism. Use of the product provides long-lasting post-workout effect. The supplementation of sports preparation is used in the disciplines of strength and endurance, available at www.muscle-zone.pl.