Your nose and mouth offer two ways of breathing. Even so, there are differences between mouth and nose breathing, with nose breathing being the most beneficial. Your nose is designed for you to breathe safely, efficiently, and properly. It will do this because it has the ability to filter out foreign particles that the mouth cannot. It will humidify the air you inhale. Your nose moisturizes and warms the air that you breathe in and makes it easier for the lungs to use. It will also produce nitric oxide, which is a vasodilator. This helps to widen blood vessels and helps improve oxygen flow in the body. The functions that the nose provides add to improved health. Breathing through the nose slows breathing and improves lung capacity. It reduces the risk of allergies and hay fever. This aids the immune system, and reduces the risk of sleep apnea and snoring.