Biohacking DigestionChronic BloatingDiaphragmatic BreathingGut-Brain AxisHSA Eligible GadgetsNeurological HealthStress and GastritisVagal ToneVagus NerveVNS Device 8 Feb 2026 Your Stomach is Fine, but Your Nerves are Failing: The Vagus Nerve Secret You eat organic, take expensive probiotics, and avoid gluten—yet your stomach still feels like a …