"The treatment involves inhaling a high level of carbon dioxide mixed with oxygen. This effectively resets the chemoreceptors- parts of the brain that tell us to breath more of less."

"While our initial hit of carbon dioxide causes a panic attack in many patients, most report positive results for hours or even days after the therapy."

"During sleep, breathing becomes more difficult because the soft tissue and tongue block the airways further."

"Buteyko claimed that by using his nasal breathing and breath-holding exercises, patients with asthma would see their symptoms improve."

"In his third book, the author explores the concept of breathing in and out, and all the ways this automatic function can affect our bodies and health."