Due to the activity of normal microflora, gaseous hydrogen is constantly formed in the human intestine. Thus, the constant contact of the human body with gaseous hydrogen is absolutely natural. One of the consequences of this contact is that the internal organs of a person are in a peculiar gas gradient formed, on the one hand, by gaseous hydrogen of intestinal origin, and on the other, by gaseous oxygen of air. Since gaseous hydrogen is an electron donor in an aqueous medium, and gaseous oxygen is their typical acceptor, the internal organs of a person find themselves in an electrostatic field, the intensity of which depends mainly on the content of hydrogen gas in the intestine. Despite the fact that this is practically obvious, the influence of such an electrostatic field on the state of the internal organs of a person, in particular, on the movement of ions in them, is usually not taken into account. Also, the exceptional penetrating power of hydrogen gas is not taken into account, due to which it can penetrate from the human intestine into the cells of other tissues and replace typical biological oxidation substrates in them. Thus, it can be expected that by controlling the formation of gaseous hydrogen in the intestine, one can also control the activity of human metabolism. For this reason, various methods that can increase the content of gaseous hydrogen in the intestines of a person may be of medical interest. Also, doctors may be interested in those sources of atomic hydrogen, the use of which can increase its content in other parts of the human body, in particular, some alternative medicine. All of this is discussed here. In addition, the medical significance of carbon dioxide, which initiates the decomposition of water into atomic hydrogen and molecular oxygen, is also analyzed here.