Mouthbreathing, it turns out, changes the physical body and transforms airways, all for the worse. Inhaling from the nose has the opposite effect. Big, heavy breaths are bad for us because they deplete our bodies of carbon dioxide. Learn how to inhale and exhale slowly. When we breathe slower and hold in more carbon dioxide, pH lowers and blood becomes more acidic. We produce and signal stem cells to build more maxilla bone in the face by clamping down on the back molars over and over--chewing.

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Breath: The New Science of a Lost Art

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