Essential Oils for Nervous System Balance: Protocols for Emotional Stability and Vagal Support 1. INTRODUCTION In the current context of 2026, nervous system health has become the number one clinical priority worldwide. According to the World Health Organization (WHO), anxiety disorders and adrenal fatigue affect over 30% of the adult population, a figure that has escalated following the global challenges of recent years. "Political anxiety" and chronic stress from technological overstimulation (digital burnout) are causing dysregulation of the vagus nerve and a state of persistent sympathetic hyperarousal. Clinical aromatherapy is not just a wellness tool but a potent neurochemical intervention. When inhaled, essential oils directly impact the limbic system—the brain's emotional center—in