What’s Actually Going on With the Vagus Nerve

You Should Know: The vagus nerve is suddenly getting its due. In wellness culture, especially, you’ve probably seen it described as a way to calm the body or reset the nervous system. Running from your brainstem all the way down to your gut, it’s the backbone of your parasympathetic nervous system. Think of it as your body’s internal messaging system, constantly passing notes between your brain and your organs and handling rest and digestion. 

Going Deeper: Medically, vagus nerve stimulation has been used for decades. The FDA has approved implanted devices to treat drug-resistant epilepsy and depression, and research is ongoing for conditions like rheumatoid arthritis and stroke rehabilitation. However, experts warn that many consumer devices marketed as vagus nerve stimulators aren’t actually stimulating it at all, and that popular techniques like cold water immersion and humming don’t “switch the nerve on,” so much as support your body’s stress response.

Takeaway: The science here is pretty exciting. But responses to stimulation vary widely between people, and researchers are still working out why some benefit more than others.

Bottom Line: Your vagus nerve is real and worth understanding. Just be skeptical about spending money on anything that promises to “hack” it.