When it comes to boosting longevity, most of us focus on the usual suspects: nutrition, exercise, sleep, and mental well-being. But an often-overlooked player in the body’s symphony of wellness is gaining traction — the vagus nerve. It’s being touted by wellness influencers and researchers alike for its potential to reduce inflammation, support brain and heart health, and even improve life expectancy.Might tickling your vagus nerve actually extend your lifespan? Here's all you need to know — from the science to the trends and the practical tools that might unlock a longer, healthier life.What Is the Vagus Nerve?The vagus nerve is the body's longest cranial nerve, running from the brainstem down to the abdomen. It is part of the parasympathetic nervous system that controls what's commonly termed as the "rest and digest" response. This strong nerve conveys messages between the brain and the large organs, such as the heart, lungs, gut, and liver.In essence, the vagus nerve regulates:Heart rateRespirationDigestionImmune functionEmotions and moodIts wide-reaching impact on critical functions makes it a crucial component of homeostasis. With the vagus nerve operating at its best, it promotes an internal equilibrium that mitigates stress, diminishes inflammation, and keeps the body ready to repair — all essential for longevity.What is Vagus Nerve Stimulation?Vagus nerve stimulation (VNS) is not an alternative theory. It's an FDA-approved therapy for a number of conditions, including treatment-resistant depression, epilepsy, cluster headaches, and migraines. Clinically, VNS usually involves an implanted device that sends electrical pulses to the nerve. The Cleveland Clinic and Mayo Clinic report that VNS is also being looked at as a treatment for inflammatory bowel disease and rheumatoid arthritis.A 2022 review in Clinical Science built on the nerve's wide therapeutic potential, mentioning its effect on systemic inflammation and autonomic control. Both functions, when dysregulated, are commonly precursors to age-related disease — suggesting why VNS could be involved in prolonging both lifespan and healthspan.Can You Stimulate Your Vagus Nerve Naturally?The vagus nerve has blown up online over the last few months, with influencers promoting do-it-yourself methods to "reset" the nervous system. These trending techniques are:Humming or chantingEar cartilage massagingNeck stretches and head tiltingCold water splashing on the faceThough the methods are being pitched for calmness, is there actually science backing the trend?In a 2020 study in Scientific Reports, researchers determined that some head and neck massage could reduce stress levels by activating the parasympathetic system. But again, the same study revealed that even typical shoulder massages provided the same benefit, which indicated that relaxation is not necessarily from the activation of the vagus nerve alone."The relaxation response probably comes from a combination of mechanisms," explains [Expert Name], a clinical researcher and neurologist. "Deep breathing, touch, and body awareness all regulate the nervous system, not the vagus nerve in isolation."Risks of Vagus Nerve StimulationAlthough these exercises are usually low-risk, professionals warn against following social media blindly without knowing the complete scenario.“There’s a risk in assuming these techniques are universally safe,” [Expert Name] warns. “For individuals with certain medical conditions — like cervical spine issues or heart arrhythmias — overstimulation or incorrect technique could do more harm than good.”If you’re considering vagus nerve exercises, especially as a part of a broader health or stress management strategy, consult your healthcare provider first.Proven Ways to Trigger the Relaxation Response SafelyIf you’re looking for science-backed ways to engage your parasympathetic nervous system and enjoy the benefits associated with vagus nerve stimulation, here are expert-recommended strategies:1. Deep BreathingOne of the easiest tools at hand is slow, diaphragmatic breathing. Research, including one appearing in Sleep Medicine, supports that slow breathing increases parasympathetic activity. The 4-7-8 technique — breathe in for 4 seconds, hold for 7, breathe out for 8 — promotes a decrease in heart rate and blood pressure, lowering strain on the body's systems with repeated use.2. Cold Water ImmersionCold water stimulation, particularly to the face, has been associated with vagus nerve activation. This activates the "diving reflex," which slows heart rate and increases vagal tone, giving a calming physiological reboot.3. Humming and ChantingSince the vagus nerve is linked to the vocal cords, vibration created from humming or chanting can potentially stimulate it. Anecdotal reports and small studies indicate that this may encourage relaxation and emotional regulation.4. Regular ExerciseExercise is still one of the best, long-term methods to maintain vagal tone. In a European Journal of Applied Physiology study, regular aerobic exercise increases parasympathetic function — not only during the exercise session, but for hours post-exercise. It helps deliver better cardiovascular resilience and emotional health, both of which correlate to increased life expectancy.Can Vagus Nerve Health Really Add Years to Your Life?Although we’re still in the early stages of research, there’s a growing consensus among scientists that vagal tone — or the strength of vagus nerve activity — plays a central role in predicting health outcomes. Low vagal tone has been associated with:Increased inflammationPoor emotional resilienceHigher risk of cardiovascular diseaseDepression and anxietyOn the other hand, increased vagal tone is associated with a more effective stress response, improved sleep, decreased inflammation, and increased heart rate variability — all characteristics of a healthy, adaptable system and increased lifespan."Stimulating the vagus nerve might not be a magic pill," states [Expert Name], "but when it is part of an integrative health regimen, it can definitely tip the scale in your direction."In an era of busy schedules and incessant digital white noise, activating the body's natural calming systems may be a longevity game changer. As much as science continues to develop the vagus nerve stimulation space, one thing is certain: activating the parasympathetic nervous system — through breathing, cold showers, or everyday movement — can be a critical component in fine-tuning both physical and mental well-being.And the more that researchers dig, the sooner we could find out that this humble nerve contains the key not only to relaxation, but to a healthier, longer life.