why is mouth taping good for sleep?

Mouth taping may help sleep by encouraging nasal rather than mouth breathing, which can reduce snoring and sleep apnea for some people. 1

• Nasal breathing and sleep: Nasal breathing during sleep is described as reducing the tendency to snore and helping offset sleep apnea. The episode also links better breathing to improved oxygen intake and carbon-dioxide offloading, and says reduced apnea may lower cortisol and support testosterone and estrogen balance. 2
• Broader health effects: Sleep apnea is associated with cardiovascular problems, sexual dysfunction, and daytime cognitive issues. Training to breathe through the nose during sleep is also associated with better daytime wakefulness and focus. 3 4
• CPAP comparison: Mouth taping is presented as a low-cost behavioral approach that may help with minor or developing sleep apnea; severe apnea may require CPAP, and medical advice is recommended. 1 5

The advice is to use mouth tape only if it is safe for you; the dental guest describes first checking that you can breathe comfortably through your nose. 6