The vagus nerve is often described as the body’s “superhighway of communication.” It plays a central role in gut health, stress response regulation, and the mind-body connection. From digestion and inflammation to mood and metabolic health, a healthy vagus nerve is essential to whole-body health.
The Gut–Brain Connection
The relationship between the gut and brain is bidirectional and is often called the microbiome–gut–brain axis. This system is remarkable and complex, linking emotional and cognitive centers in the brain with cells of our digestive system, endocrine system and the gut microbiome.
Key players include:
- Central nervous system – the brain and spinal cord
- Enteric nervous system – the “brain of the gut”
- Enteroendocrine cells – enterochromaffin cells that sense nutrients and other factors and release hormones and neurotransmitters (think serotonin)
- Gut microbiome – bacteria and other organisms living in the digestive tract
The vagus nerve is the main messenger in this axis. About 80% of its fibers carry signals upward from the gut to the brain, while only 20% of the fibers carry signals down from the brain to the gut. Gut microbes produce neurotransmitters and short-chain fatty acids that influence the enterochromaffin cells, which signal to the vagus nerve, influencing appetite, mood, and even abdominal discomfort. In turn, the brain communicates back down, affecting motility, inflammation, gut lining integrity (sometimes referred to as “leaky gut”), and the microbial balance.
When this system is disrupted, conditions such as irritable bowel syndrome (IBS), inflammatory bowel disease (IBD), anxiety, and depression may exist. Because of this association, vagus nerve stimulation is being explored as a therapeutic tool for these conditions, with the goal of repairing the microbiome–gut–brain axis.
Measuring and Supporting Vagus Nerve Health
One of the most practical ways to measure vagus nerve function is by tracking heart rate variability (HRV) — the variation in time between heartbeats. Higher HRV is associated with better vagal tone, improved stress resilience, and better health status. Many wearable devices now make HRV monitoring accessible at home.
Fortunately, there are many non-invasive practices shown to improve vagal tone and support both gut and mental health:
- Slow, deep breathing such as the 4-7-8 breath popularized by Dr. Andrew Weil
- HRV biofeedback training such as Heartmath/Inner Balance
- Meditation and mindfulness for stress reduction
- Yoga, dance, and aerobic exercise
- Spending time in nature, music (e.g., Mozart), and connecting with pets
- Social engagement and community connection
The key is consistency. Even a few minutes daily of slow breathing or gentle movement can help shift the nervous system into a calmer state, supporting both physical health and emotional well-being.
Complementing Anxiety and Depression Treatment
Vagus-activating practices can be an important complement to therapy and medical treatment of anxiety and depression. While conventional treatments are highly effective, adding breathing exercises, mindfulness, or exercise can strengthen vagal tone and provide an additional layer of resilience.
Because there is no one-size-fits-all approach, the most effective plan is personalized. At BOJANA MD, we integrate evidence-based practices from internal medicine, integrative and functional medicine, as well as mind-body practices. We then work with our patients to identify optimal treatment and sustainable and enjoyable practices for each person, making it easier to integrate them into daily life.
Connection, Relationships, and Meaning
Beyond digestion and stress, the vagus nerve also plays a role in emotional health and social connection. Our parasympathetic “rest and digest” nerve supports our ability to interpret emotions and plays a role in cooperation, ultimately enhancing empathy, bonding and social engagement.
This underscores how a healthy vagus nerve benefits not just our gut and brain health, but also the quality of our relationships and community connections.
Takeaway
Supporting vagus nerve health is a powerful way to care for the gut-brain axis, mental health, and emotional well-being. Through consistent lifestyle practices — from mindful breathing to exercise and social engagement — we can support our overall health and enhance stress resilience.
Ready to Support Your Gut–Brain Health?
If you are experiencing gut issues, anxiety, depression, or chronic stress, you don’t have to navigate it alone. Dr. Bojana Jankovic Weatherly is a board-certified internal medicine, integrative and functional medicine physician offering personalized care to address the root causes of your symptoms.
She provides telemedicine services to patients in New York, New Jersey, Connecticut, Florida, and California. Together, you can create a treatment plan that supports your gut health, vagus nerve function, and overall longevity.
To learn more or schedule a complimentary discovery call, contact our office at 646.627.8000 or email Bridget@drbojana.com.