Xtreme Endurance Matrix, is a complex of taurine and tyrosine affecting the levels of neurotransmitters, delaying the fatigue in time, and beta-alanine. Amino acids, contained in the composition of the matrix, influence the course of metabolism and energy transformations. Also, beta-alanine, which is a precursor of carnosine, has the antioxidant potential and removes excess hydrogen ions in muscle cells. In the sports supplementation it is used as an adjuvant, enhancing exercise capacity (strength, endurance, ability to concentrate and memory). Xtreme Endurance Matrix co-creates pre-workout supplement "Xtreme Pump" by Fitness Authority, available at www.muscle-zone.pl.