Nasal breathing plays a crucial role in human health and performance. Scientifically, the nose filters dust, allergens, and pathogens while warming and humidifying the air before it reaches the lungs. This process improves oxygen absorption and supports better lung function. Nasal breathing also stimulates the production of nitric oxide, which enhances blood flow and oxygen delivery throughout the body. Compared to mouth breathing, it helps regulate breathing rhythm, reduces stress, and supports deeper, calmer respiration. Many experts now recommend nasal breathing as an effective
breathing method for improving sleep quality, athletic endurance, and overall well-being in daily life.