this book of James Nestor's (click picture to see full image) may return us to our senses and move medicine finally in the paths from which it has strayed for so many years seduced by mechanical technical approaches  and solutions to life and health forgetting what we have been given as our natural inheritance. Look here at BREATH 

Catlin is a famous portrait artist of the 19th century who lived among the indigenous people of the Americas whose various portraits he painted. They taught him a life saving secret which he employed and wrote about in this piece

So many important health giving  physiological functions occur  when we breathe through our noses including huge benefits to our dental development and health over all. Nitric Oxide we produce in our sinuses protects us and helps with our circulation and oxygen utilization.  Mouth Breathing disables all of that and re Nitric Oxide in Particular benefits and healing using additional controlled levels 

Patric goes into detail about healthy breathing including while exercising so poorly understood by far too many.  Here he is on London Real brief piece

Here are the two full programs with Patrick. Hang in there after the first one and the second will come up with Patrick doing into more details and how to change.