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Dentists and orthodontists have also documented these profound facial changes as a result of habitual mouth breathing: narrow jaws, crooked teeth, sunken cheekbones, and smaller nasal cavities. While orthodontic treatment and the wearing of braces are epidemic among modern-day teenagers, it was normal for our ancestors to have wide faces with perfectly shaped teeth.
The Oxygen Advantage: The Simple, Scientifically Proven Breathing Techniques for a Healthier, Slimmer, Faster, and Fitter You
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