In this reaction, arginine is transformed into gas hormone – nitric oxide (NO). Nitric oxide triggers the production of cyclic nucleotides. In muscular tissue, cyclic nucleotides take part in blood circulation and oxygen, amino acids, creatine and energy elements distribution, as well as in generating strength impulses and protein anabolism. Thus, they stimulate strength increase and muscle growth. On the other hand, in fat cells, cyclic nucleotides intensify the processes of lipolysis and thermo genesis, that is the dissociation of spare fat cells which liberates thermal energy.
In this reaction, arginine is transformed into polyamines – essential for protein synthesis. Not only do polyamines build up muscle tissue with proteins, but they also produce new muscle cells! So, thanks to arginine (indirectly), we can achieve constant and permanent muscle growth.
In this reaction, arginine is transformed into agmatine – an amine, which has similar characteristics to thermogenics, especially yohimbine. Agmatine increases the level of cyclic nucleotides, which, as already mentioned in point 1, influences muscle growth and fat reduction.

Arginine is also transformed into creatine, which was not mentioned in the points above, because of the widespread accessibility of creatine supplements.

Arginine undergoes complete dissociation into carbon dioxide and water. This reaction is inhibited by an indirect metabolite of arginine – alpha ketoglutarate (AKG), which, coupled with arginine, gives AAKG – multiplying the activated form of this amino acid.