Across 2 decoded pieces of advice. This scores the state of the evidence behind what they say — not them, and not their honesty. Good creators cover contested ground; that shows up here as mixed.
There is a real, documented reflex connecting the face to the vagus nerve: the trigeminocardiac reflex (used clinically, e.g., in neurosurgery, and related to the 'diving reflex' that slows the heart) — stimulating the trigeminal nerve (facial sensation) can trigger a vagal bradycardia response. But that reflex is typically triggered by cold water on the face plus breath-holding, not simply puffing your cheeks with warm air under muscular pressure. The video takes a real mechanism (the trigeminal-vagal connection exists) and applies it to a gesture (cheek pressure) that hasn't been studied as a trigger for that reflex — that's extrapolation, not evidence. It's plausible the exercise relaxes the jaw and face locally, and that slowing your breathing alongside it adds a generic calming effect already documented elsewhere, but the specific claim of a 'signal sent through the vagus nerve pathway' via cheek pressure has no direct support. Verdict: unproven — the trigeminal-vagal connection is real in other contexts, but not demonstrated for this specific gesture.
The idea that relaxing your jaw and tongue 'communicates with the nervous system' implicitly leans on polyvagal theory (Stephen Porges), which proposes a 'safety neuroception' mechanism through specific vagal pathways. That theory is now actively disputed: a 2025-2026 paper co-authored by 39 named experts in vagal physiology and vertebrate evolution — several of whom were previously cited as supporting evidence for the theory — concludes its core neuroanatomical and evolutionary claims are 'not defensible based on existing neurophysiological and evolutionary evidence.' Genuine vagal-stimulation exercises do exist in the clinical literature — for instance, transcutaneous auricular vagus nerve stimulation, which showed reduced jaw-muscle activity and anxiety in a double-blind trial — but those are precise electrical protocols, not gently moving your tongue and jaw. It's plausible that relaxing your jaw and tongue brings real local muscle release and a general calming effect, but the specific claim of a 'signal sent to the vagus nerve' has no direct evidence behind it. Verdict: unproven — the gesture may well relax you, but the vagal mechanism invoked rests on a theoretical framework now challenged by a large, named expert consensus.
