The vagus nerve connects brain to gut to immune system, when it's impaired, everything is affected.
The vagus nerve is the longest cranial nerve in the body and the primary component of the parasympathetic nervous system, governing digestion, heart rate, immune modulation, inflammatory control, and the body's ability to shift from stress response into rest and recovery. Low vagal tone is associated with poor gut motility, immune dysregulation, anxiety, difficulty recovering from illness, and chronic fatigue.
Chronic infections, trauma, systemic inflammation, and toxic burden can all impair vagal tone. Supporting vagus nerve function through targeted breathwork, movement, and nervous system regulation protocols is a key component of Dr. Jaban's approach, because a well-functioning vagus nerve is essential to the body's capacity to heal from the inside out.