Dr. Kevin Tracey is a pioneer in understanding the molecular basis of inflammation, and identifying the way in which neurons control the immune system via the Vagus Nerve. A neurosurgeon, scientist and entrepreneur, he is CEO of Feinstein Institutes, New York, where they bridge neuroscience, molecular biology and biomedical engineering. His lab’s discoveries led to the first clinical trials in neuromodulating devices paving the way for a new field, termed bioelectronic medicine.

In his new book “The Great Nerve, the new science of the Vagus Nerve and how to harness its healing reflexes” he has distilled his research to try and make complex science accessible so that those of us without medical degrees are able to sort the fact from the fiction when it comes to the, much-discussed, Vagus Nerve. In this week’s episode Dr Tracey sits down with Emily Kate Stephens to discuss his expansive work and how he believes that this could be a tipping point in our management and treatment of a wide range of diseases.

He explains the role of the Vagus Nerve, a highly complex superhighway carrying messages between the body and the brain, which controls the reflexes of organ function to maintain the body in homeostasis and balance the sympathetic and parasympathetic nervous systems. Understanding this, previously unmapped, connection between the body’s and the brain’s networks has huge implications for treating inflammatory conditions from rheumatoid arthritis to depression, with millions of patients already being treated with implanted neuromodulating devices.

But, he also highlights the need for maintaining the highest scientific rigour and continuing to research why such treatment is effective in some patients and not all. He points to the need for larger clinical trials to understand the effectiveness of vagal nerve stimulation (VNS) in implanted devices and particularly in the less-regulated ear-based devices. He wants to arm patients with the information to enable them to self-advocate and explore the possibilities of using the healing power of the Vagus Nerve to replace anti-inflammatory drugs, with the potential to slow disease progression and accelerate healing.

Scientific paper references:

Sheep on a treadmill, J.Shanks 2023

The Inflammatory Reflex, K.Tracey 2002

FDA approval of VNS in Rheumatoid Arthritis 2025

Auricular Vagus Neuromodulation, review 2021

Books:

The Great Nerve

The Inflamed Mind

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@visible_health

@visible.health