The Vagus Nerve: Your Secret Weapon Against Mast Cell Flares

If you live with Mast Cell Activation Syndrome (MCAS), you know that stress is more than just a feeling—it's a physical trigger. A stressful meeting, a difficult conversation, or even just the daily grind of modern life can be enough to send your mast cells into a frenzy, unleashing a cascade of symptoms that can ruin your day. You're not imagining it, and you're not alone. The connection between your mind and your mast cells is a powerful, scientifically validated reality.