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In this episode of Revolution Health Radio, Chris Kresser explores the viral trend of mouth taping and explains why the reality is more complex than the hype. While nasal breathing offers clear physiological advantages such as improved oxygen delivery, air filtration, and reduced airway resistance, the current research on mouth taping itself is limited and mixed. Chris breaks down findings from a recent systematic review of scientific literature, discusses potential safety concerns, and explains why mouth taping could worsen breathing for some individuals, particularly those with nasal obstruction or untreated obstructive sleep apnea. This episode emphasizes the importance of individualized assessment, proper diagnosis of sleep disorders, and addressing underlying airway issues before considering mouth taping.