Oxygen is fundamentally essential for the functioning of all tissues and organs, including the capillaries, which are the smallest blood vessels in the body. The primary role of capillaries is to facilitate the exchange of gases, nutrients, and waste products between the blood and surrounding tissues. Scientific evidence robustly supports the critical importance of oxygen in this context. Oxygen is carried by red blood cells from the lungs to the body’s tissues, where it diffuses through capillary walls to reach cells. Without adequate oxygen delivery, capillaries cannot effectively fulfill their role, leading to tissue hypoxia and cellular dysfunction.

Medical literature consistently shows that oxygen therapy is used to treat conditions where capillary oxygen delivery is impaired, such as in cases of shock, severe anemia, or respiratory failure. For example, supplemental oxygen is a cornerstone in the management of diseases like chronic obstructive pulmonary disease (COPD), pneumonia, and acute respiratory distress syndrome (ARDS), where tissue oxygenation—including that supplied via capillaries—is compromised. There is no traditional or anecdotal basis for using oxygen in this context; its use is entirely grounded in physiological principles and extensive clinical research. Overall, the role of oxygen in supporting the capillary system is not only scientifically validated, but universally recognized in modern medicine.