The experiments carried out on outbred white male rats have demonstrated that twice repeated immobilization stress resulted in the destruction of intracellular organelles and interfered with the regeneration processes in the Sertoli cells and Leydig cells. The combination of the consumption of drinking mineral sulfate water (MW) with the application of a constant or alternating magnetic field (MF) caused stimulation of intracellular regenerative reactions that were especially pronounced in the Sertoli cells in the form of enhanced organoid and intra-organoid regeneration of mitochondria. This in turn increased biological potential of the cells and thereby provided a basis for the further development of biosynthetic processes. The results of the study expose to a certain degree the causes and mechanisms responsible for the higher effectiveness of the combined action of mineral water and magnetic fields compared with the monofactor treatment (mineral water alone).