Oxygen is a colorless and odorless gas and the most important energy to sustain life. Like food and water, oxygen is one of the most basic elements of human health. People breathe, inhale oxygen and exhale carbon dioxide every minute. It is this kind of dispelling the old and absorbing the new that makes the human body gain life energy. Food, water and air are the three material bases of human body. Facts have proved that the average human body can maintain life for about 7 days without eating or drinking on the premise of fully obtaining oxygen, and it can maintain life for about 3 days without eating or drinking; But in the case of hypoxia, the diet is not lacking, but it can only last for a few minutes. "Breath of life" determines the first place of oxygen in life energy.
Oxygen is the key substance to maintain the vitality of immune function. When people get enough oxygen, the nutrients they ingest are oxidized before being used by cells, and converted into energy to supply various tissues and organs, thus ensuring the normal work of the immune system. When people lack oxygen, the function and immunity of various organs will decline, thus promoting the ability to resist viruses. Experts pointed out: "Without oxygen, people's life activities will stop"; "Hypoxia can cause diseases of human organs", which is due to the long-term hypoxia of the immune system, resulting in dysfunction. Hideki Noguchi, the highest medical authority in Japan, pointed out: "Hypoxia is the source of the September 1st disease". The human body consumes 0.25-0.30 liters of oxygen per minute, of which the brain consumes about 25% and the heart consumes more than 15%. Once deprived of oxygen, the brain and heart are damaged first. However, the more oxygen, the better. Excessive inhalation is also harmful to people of different ages.