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The science

Breathing is one of the most vital functions of the human body. Each breath can have a positive or negative impact on our body depending on how it is performed; and it Chas been scientifically established many times that healthy breathing goes through the nose.

With healthy breathing, the abdomen gently expands and contracts with each inhalation and exhalation. There is no exertion, the breath is still, regular but above all; through the nose.

However, it is estimated that 30 to 50% of modern adults breathe through the mouth, mainly during the night.

One of the main benefits of nasal breathing is the production of nitric oxide.

Nitric oxide inhaled through nasal breathing has been shown to increase oxygen exchange efficiency and increase oxygen in the blood by 18% while improving the lungs' ability to absorb oxygen. Mouth breathers have a lower concentration of oxygen in their blood than people with optimal nasal breathing; low blood oxygen levels are associated with high blood pressure and heart failure. 

Nitric oxide occurs in human breath, but little is known about its origin or enzyme source. Most nitric oxide in the human body (about 25%) is produced by nasal breathing.  This molecule is produced in mammalian cells by specific enzymes and plays a vital role in many biological processes, including the regulation of the blood flow, platelet function, immune defense, homeostasis and neurotransmission.

In addition, nitric oxide has many other benefits:

  • Improves memory and learning
  • Regulates blood pressure 
  • Regulates the inflammatory response
  • Improves sleep quality
  • Increases stamina and strength
  • Promotes weight loss
  • Improves bowel function 
  • Relieves pain
  • Reduces the risk of cardiovascular disease
  • Helps improve symptoms of anxiety and depression

Sleep better

Breathing through your nose while sleeping has a positive effect on your sleep

Oral health

Breathing through your mouth has adverse effects on oral health.

Beauty

Mouth breathing has adverse effects on facial structure and body posture.

Performance

Nasal breathing has a positive impact on your cognitive and physical performance

Sleep better

Recent research, stimulated by the growing awareness of sleep apnea, has shown that nasal breathing plays an important role in the regulation of breathing in sleep. These sightings are not new; they confirm age-old clinical findings about the importance of nasal breathing in sleep. The earliest description of the harmful effects of mouth breathing in sleep was made by Lemnious Levinus towards the end of the sixteenth century. Two hundred years later, Catlin devoted an entire book to the superiority of nasal breathing over mouth breathing in sleep; and in the late 1800s, Cline, Wells, Griffin, and others showed that obstructed nasal breathing causes sleep disturbances. 

Many sleep disorders, such as waking up frequently or having difficulty falling asleep, are caused by an oxygen deficiency due to mouth breathing. 

The nose is equipped with a complex filtering mechanism that purifies the inhaled air before it enters the lungs. Breathing through the nose during inhalation and exhalation helps maintain lung volumes and increases oxygen uptake by 10 to 20%.

Upper airway resistance during sleep and propensity for obstructive sleep apnea are significantly lower with nasal breathing than with mouth breathing. In the image above you can see the differences between the breathing route of mouth breathing (A) and nose breathing (B).

Taping the mouth shut also significantly reduces snoring. Recent scientific research has shown that about half of people no longer snore after taping their mouth shut. It was found that the worse someone snored, the more significant the improvements were.

Oral health

Nasal breathing is one of the most important factors for the proper development and functioning of the oral cavity. The air passing through the nasal cavity is warmed and humidified while removing dust and other particles. Obstruction or blockage of the upper airways can negatively influence the most optimal (nasal) breathing. The transition from nose to mouth breathing can have adverse clinical consequences for oral health.

Mouth breathers more often suffer from an overbite and craniofacial bone abnormalities (an abnormality of the skull, jaw or facial structure). 

In addition to an overbite, chronically inflamed gums, fungal infections and halitosis (bad breath) are common in mouth breathers.

Mouth breathers are also more likely to suffer from a dry mouth. Dry mouth is not only uncomfortable, it is harmful to the oral microbiome and can negatively impact oral and dental health.Dry mouth promotes cavities because the teeth are not bathed in saliva, which contains certain nutrients essential to the remineralization process.

Dry mouth also lowers the pH of the mouth into the acidic zone, which allows bacteria to thrive and therefore more likely to cause cavities.

Beauty

Most health professionals are unaware of the negative impact of upper airway obstruction (mouth breathing) on normal facial growth and physiological health. Children who go untreated for mouth breathing can develop a long, narrow face, narrow mouth, high palate, overbite, "gummy smile" (excessive visible gums when smiling), and many other unattractive facial features. (Young) adults can also be confronted with this.

In addition to abnormal facial features, postural problems can also occur in people who frequently breathe through their mouths. Mouth breathers tend to assume a characteristic posture, carrying their heads forward to compensate for the restriction of their airways and allow breathing. This can lead to neck and back pain.

Performance 

Former Tour de France winner Joop Zoetemelk once said: "You win the Tour in bed". He was one of the first top athletes to emphasize the importance of a good night's sleep. Many subsequent studies have endorsed the impact of a good night's sleep on cognitive and physical performance. The difference between breathing through the mouth and breathing through the nose and the impact of this on (sports) performance has also been extensively researched.

Nasal breathing produces more nitric oxide and this has a positive effect on endurance and strength and promotes recovery. In addition, it has been shown how respiration biomechanics and exercise capacity were negatively affected by mouth breathing; and that the presence of moderate forward head posture acted as a compensatory mechanism to improve respiratory muscle function. This forward head posture often leads to muscle fatigue, neck pain, compression of the intervertebral discs, premature arthritis, tension headaches and dental malformation problems.

Sources

  • Conti PB, Sakano E, Ribeiro MA, Schivinski CI, Ribeiro JD. Assessment of the body posture of mouth-breathing children and adolescents. Journal Pediatrics (Rio J). 2011  
  • Fitzpatrick MF, McLean H, Urton AM, Tan A, O'Donnell D, Driver HS. Effect of nasal or oral breathing route on upper airway resistance during sleep. Eur Respir J. 2003 
  • Guilleminault C, Sullivan S. Towards Restoration of Continuous Nasal Breathing as the Ultimate Treatment. Goal in Pediatric Obstructive Sleep Apnoea. Enliven: Pediatrics and Neonatal Biology. Sept 1st 2014. 
  • Lundberg J, Weitzberg E. Nasal nitric oxide in man. Thorax.1999 
  • Dillon WC1, Hampl V, Shultz PJ, Rubins JB, Archer SL. Origins of breath nitric oxide in humans. chest. 1996 
  • Brown RP and Gerbarg PL The Healing Power of the Breath, Boston: Shambhala Publications, Inc. 2012 
  • Chang HR Nitric Oxide, the Mighty Molecule: Its Benefits for Your Health and Well-being, Jacksonville, FL: The Mind Society. 2011 
  • Fried RL Breathe Well, Be Well, New York: John Wiley & Sons Inc. 1999
  • Graham T Relief from snoring and sleep apnoea, Melbourne: Penguin Group (Australia) 2012 
  • Honl TJ Chronic Mouth Breathing: A serious Health Concern, Stevens Point Journal, Column 12, February 2013 
  • Jefferson Y Mouth Breathing: Adverse effects on facial growth, health, academics, and behaviour, General Dentistry, January/February 2010 
  • Juliano ML et al , Polysomnographic findings are associated with cephalometric measurements in mouth-breathing children, Journal of Clinical Sleep Medicine, Dec 2009 
  • Lundberg JO Nitric oxide and the paranasal sinuses, The Anatomical Record, 2008 
  • McKeown P Close Your Mouth, Moycullen, Co. Galway: Buteyko Books. 2013 
  • O'Hehir T and Francis A Mouth Vs Nasal Breathing, hygienetown, September, 2012 
  • Rakhimov A Breath Slower and Less: The Greatest Health Discovery Ever,Ontario: Rakhimov Publications. 2014 
  • Trabalon M and Scale B It Takes a Mouth to Eat and a Nose to Breathe:Abnormal oral respiration affects Neonates Oral Competence and Systemic Adaptation, International Journal of Pediatrics, 2012 
  • Weitzberg E and Lundberg JO. Humming Greatly Increases Nasal NitricOxide, Am J Respiratory Crit Care Med, 2002 
  • Djupesland PG, Chatkin JM, Qian W, Haight JS. Nitric oxide in the nasal airway: A new dimension inotorhinolaryngology. Am J Otolaryngol 2001 
  •  Shibata M, Yamakoshi T, Yamakoshi KI. Physiological role of nitric oxide in oxygen consumption byanterior wall. Conf Proc IEEE Eng Med Biol Soc 2008 
  •  Page DC. Your jaws your life. Baltimore: Smile-Page Publishing; 2003. 
  •  Bian K, Doursout MF, Murad F. Vascular system: Role of nitric oxide in cardiovascular diseases. J Clin Hypertens (Greenwich). 2008 
  •  Feletou M, Tang EH, Vanhoutte PM. Nitric oxide the gatekeeper of endothelial vasomotor control. Front Biosci 2008 
  •  Sumino H, Sato K, Sakamaki T, Masuda H, Nakamura T, Kanda T, Nagai R. Decreased basalproduction of nitric oxide in patients with heart disease. Chest 1998 
  •  Rush JW, Denniss SG, Graham DA. Vascular nitric oxide and oxidative stress: Determinants ofendothelial adaptations to cardiovascular disease and to physical activity. Can J Appl Physiol 2005 
  •  Danson EJ, Paterson DJ. Cardiac neurobiology of nitric oxide synthases. Ann NY Acad Sci 2005 
  •  Phillips L, Toledo AH, Lopez-Neblina F, Anaya-Prado R, Toledo-Pereyra LH. Nitric oxide mechanism of protection in ischemia and reperfusion injury. J Invest Surg 2009 
  • Olsen KD, Kern EB, Westbrook PR. Sleep and breathing disturbance secondary to nasal obstruction.Otolaryngol Head Neck Surg 1981 
  •  Meurice JC, Marc I, Carrier G, Series F. Effects of mouth opening on upper airway collapsibility innormal sleeping subjects. Am J Respir Crit Care Med 1996 
  • Oeverland B, Akre H, Skatvedt O. Oral breathing in patients with sleep-related breathing disorders.Acta Otolaryngol 2002