Holding the tongue fully extended for exactly 40 seconds rapidly flushes cortisol, overrides fight-or-flight, and works faster than anxiety medication, breathing, or meditation.
Established evidence: cortisol is regulated through the hypothalamic-pituitary-adrenal axis and clears over roughly an hour, not through a demonstrated instant tongue-stretch reflex. Inference: a brief tongue stretch could feel calming or distracting for some people, but that would not establish a hormonal reset. Uncertainty: no credible controlled clinical evidence was identified showing that 40 seconds of tongue extension lowers cortisol or treats anxiety faster than breathing exercises or medication.