Muscle VoluSize Matrix, a blend containing beta-alanine is a precursor of carnosine, creatine ethyl ester HCL and creatine monohydrate. Beta-alanine is a precursor of carnosine. Carnosine is a dipeptide containing the amino acids (beta-alanine and L-histidine) located in the muscle and nerve tissue. It is a potent antioxidant and anti-buffering and chelating properties. It prevents the development of neurological disorders associated with ageing, used in prevention of cancer, inhibiting the glycosylation and carbonylation processes. Maintains acid-base balance in the muscle tissue contributing to the increase in exercise capacity. It has an impact on the metabolism nitrogen. Creatine monohydrate (creatine monohydrate) is a popular and cheapest form of creatine used in sports supplementation in Poland. This is a molecule, in which are bound: creatine molecule with a molecule of water. It has a high bioavailability and tissue velocity saturation. Supports the exercise capacity (strength and endurance), accelerates muscle growth and regeneration after training exercise. Transport of creatine into the muscle cells is supported by the insulin hormone. For better effect of saturation of the tissues, a diet increasing the content of insulin in the body is indicated (carbohydrate and high protein diet). Ethyl ester HCl (CEO) with a high anabolic and catabolic and erogenic potential, obtained through esterification, to for a higher bioavailability of creatine, and thus reducing the value of its individual doses. This results in lower weight gain than the use of special forms of creatine but of better quality. Creatine ethyl ester is used in sports supplementation to obtain improvement in exercise capacity (strength and endurance). Both forms of creatine increase the level of phosphocreatine in the muscles affecting the playback of ATP energy, affect the course of the proteins synthesis, block the activity of catabolic enzymes. Muscle VoluSize Matrix is a formula contained in the preparation Muscle Serum by Fitness Athority, available at www.muscle-zone.pl