Digestive comfort.
Designed to support digestion through your gut–brain connection.
Gut health meets neuroscience
Your gut
shouldn’t run
your life.
Meet Nevia®, a gut-health wearable designed to support digestive comfort and everyday calm through non-invasive, dual-site vagus nerve stimulation.
02minutes per session
02sessions per day
02stimulation sites: neck + ear
More room for what matters
Less planning around your gut.
More living.
We’re building Nevia to make everyday gut care simpler.
Everyday calm.
A moment for yourself, built around the body’s “rest and digest” pathways.
A routine that fits.
Two minutes, twice a day.
Your everyday Nevia
Two minutes.
Twice a day.
Put on Nevia.
Fit the neckband and place the earpiece in your left ear.
Start your session.
Let the app guide your two-minute session.
Make it daily.
Morning and evening. Track your gut-health patterns in the app.
How Nevia® works
Two stimulation sites.
One gut–brain connection.
The connected earpiece and neckband target the vagus nerve at your left ear and neck.
Inner pathways
Toward the brainToward the gut
Tap the labels to explore how Nevia® works.
Follow the connection
01 / The connected earpieceA small point
A small point
of connection.
The earpiece sits in the upper bowl of your left ear (cymba concha), targeting a sensory vagus nerve branch that carries signals to the brainstem.
Explore ear-stimulation research02 / The sculpted neckbandA second site.
A second site.
The same connection.
The neckband wraps around your neck, stimulating through the skin on the left side to target the cervical vagus nerve beneath.
Explore neck-stimulation research03 / The brainstemWhere incoming
Where incoming
signals are processed.
The brainstem processes incoming signals and helps coordinate digestion through vagal pathways.
See the human studies04 / The gut–brain connectionPart of your body’s
Part of your body’s
“rest and digest.”
The vagus nerve branches toward the stomach and intestinal nervous system, carrying signals between your brain and gut to help coordinate digestion.
Explore gut-health research- 01Ear + neckStimulation
- 02BrainstemIncoming signals
- 03GutDigestive pathways
Published research · Ear & neck stimulation
Your gut. Your calm.
Your everyday life.
Human studies have explored ear and neck stimulation for digestion, stress response and sleep.
EarControlled trial
Less belly pain
64%
Lower average belly-pain scores than the comparison group after four weeks.
IBS with constipation · 42 randomized
See the studyEarControlled trial
Easier bowel movements
3×
As many complete, unassisted bowel movements: 2.8 per week versus 0.9 in the comparison group.
Same IBS trial · Four weeks
See the studyEarControlled trial
Digestive comfort
76–81%
Met the study’s symptom-improvement target, versus 47% in the comparison group.
300 adults with persistent indigestion · Four weeks
See the studyNeckEarly pilot · No control group
Stomach symptom relief
40%
Met the study’s symptom-improvement target: 6 of 15 participants.
Gastroparesis, a stomach-emptying disorder · At least four weeks
See the studyNeckControlled pilot
Physical stress response
5.7%
Lower heart-rate response to traumatic stress than the comparison group.
25 adults with PTSD · Three-day laboratory study
See the studyEarControlled trial
More restful nights
69%
Cut their sleep-problem score by at least half, versus 28% in the comparison group.
72 adults with chronic insomnia · Eight weeks
See the studyPublished studies of other vagus nerve stimulators inform Nevia’s approach. Explore the studies, devices and routines behind these findings.
From symptoms to everyday life
Quality of life improved, too.
The IBS trial also found better quality-of-life scores, using a questionnaire covering daily activities, food avoidance and relationships.
+13.7 points
How quality of life was measured
Higher IBS quality-of-life score than the comparison group.
83.2 versus 69.5 on a 0–100 scale.
Explore the gut-health studies
Digestion · 300 adults · 4 weeks
Less indigestion, better gut-related quality of life
This randomized trial compared two ear-stimulation settings with sham, a treatment designed to imitate stimulation. Response rates were 81.2% at 10 Hz, 75.9% at 25 Hz and 47% with sham. Response meant at least a five-point drop in symptom scores, not complete relief. Sessions lasted 30 minutes, twice daily, for four weeks.
Both stimulation groups also improved more on the Short-Form Nepean Dyspepsia Index, which measures indigestion’s impact on daily life. The overall scores do not establish specific gains in social outings or meals with friends.
Shi et al. · American Journal of Gastroenterology · 2024 ↗︎Author-shared full paper, including quality-of-life results ↗︎
Ear stimulation · IBS with constipation · Four weeks
Less pain, improved bowel function and quality of life
Of 42 people randomized, 40 completed the study. Pain scores averaged 1.1 versus 3.1 with sham on a 0–10 scale: 64% lower. Complete spontaneous bowel movements averaged 2.8 versus 0.9 weekly: about three times as many.
The 13.7-point quality-of-life difference comes from group averages of 83.2 versus 69.5; higher is better. Individual questionnaire areas were not separately reported as improved.
Sessions lasted 30 minutes twice daily at a single study center.
A second IBS study found a similar pattern
Another four-week randomized trial in 40 adults with IBS and constipation found better pain, bowel function, anxiety, depression and quality-of-life scores with ear stimulation versus sham.
Liu et al. · American Journal of Gastroenterology · 2025 (online 2024) ↗︎
Neck stimulation · Gastroparesis · Early pilot
Six of 15 participants met the response threshold
After at least four weeks of neck stimulation, average digestive-symptom scores fell from 2.56 to 1.87. Six of 15 participants met the response target: a drop of at least 0.75 points.
Without a control group, the study cannot attribute improvement to stimulation. Overall health did not significantly improve. Findings concern gastroparesis specifically.
Gottfried-Blackmore et al. · Neurogastroenterology & Motility · 2020 ↗︎
Results depend on the condition and treatment
A neck-stimulation trial in people with diabetes and nerve damage found no clear digestive-symptom advantage over sham. These gut studies did not test Nevia’s combined device or two-minute routine.
Why quality of life matters
Among 2,013 U.S. adults with IBS surveyed by AGA/Harris Poll, 77% avoided places with limited bathroom access, 72% struggled to plan around unpredictable symptoms, and 58% spent less time with loved ones.
These describe IBS’s impact, not stimulation outcomes. The online survey ran in 2024 and was released in 2025, supported by Salix Pharmaceuticals.
Sleep, stress, mood & period comfort
Ear stimulation and sleep quality
In 72 adults with chronic insomnia, 69.4% receiving ear stimulation reduced their Pittsburgh Sleep Quality Index score by at least half after eight weeks, versus 27.8% with sham. Headline percentages are rounded.
Average score change, the primary outcome, was 4.2 points better than sham, with benefits at the 12-week follow-up. Sessions lasted 30 minutes twice daily, five days a week. The findings measure reported sleep quality, not extra sleep time.
Neck stimulation and the body’s stress response
In a randomized, double-blind study of 25 adults with PTSD, left-neck stimulation lowered heart-rate response to traumatic stress by 5.7% versus sham. This measures physical arousal, not emotional well-being.
Thirteen received stimulation and 12 received sham during a three-day laboratory study using two-minute applications. Findings support further research into stress regulation; everyday anxiety relief was not established.
Emotional well-being
Two small add-on studies in 37 adults with depression found improvements in self-reported mood with ear stimulation. Clinician-rated scores showed no clear difference. Findings remain preliminary and mixed.
Period comfort
A small trial in 34 people with painful periods found less pain and fewer menstrual symptoms with ear stimulation than with sham. This early finding does not establish hormone balance, fertility or cycle-regulation benefits.
These studies used different devices, routines and patient groups. They do not establish Nevia’s benefits or show that gut improvement caused other wellness outcomes.
What does the research say about safety?
Generally well tolerated in published ear-stimulation studies
A review of 177 studies covering 6,322 participants found no causal link between ear stimulation and severe adverse events. Commonly reported effects included ear discomfort, headache and tingling.
Safety reporting was incomplete: more than half the studies did not state whether adverse events occurred. These findings concern ear stimulation with the studied devices, not Nevia’s combined neck-and-ear device.
Early research in inflammatory bowel disease
Exploring symptoms and inflammation
A study of 22 young people with Crohn’s disease or ulcerative colitis reported improvements in symptoms and an intestinal inflammation marker. An initial randomized crossover phase was followed by active treatment for everyone through week 16.
The longer phase had no concurrent sham comparison. The sample was small and prospective endoscopic assessment was not included, so these findings remain preliminary.
From research to daily gut care.
Nevia brings neck and ear stimulation into one app-guided routine.
Four colors. One Nevia.
Your Nevia. Your color.
Choose the finish that feels like you.
Enteronova®
Meet the team
behind Nevia.
Experts in gut health, neuroscience and engineering. Focused on everyday gut care.
Aadil Diwan
Founder & CEO
Enteronova®
Scott D. Lee, MD
Director, Clinical IBD Program
UW Medicine
Jason W. Harper, MD
Medical Director, IBD Center
Swedish Gastroenterology
Margaret D. Eugenio, MD
Clinical Professor of Medicine; GI Motility
University of Washington
Rajesh P. N. Rao, PhD
Co-Director, Center for Neurotechnology
University of Washington
Eric J. Seibel, PhD
Research Professor, Mechanical Engineering
University of Washington
Per Reinhall, PhD
Professor Emeritus, Mechanical Engineering
University of Washington
Kindra Clark-Snustad, DNP
Gastroenterology
UW Medical Center
Nina Saxena, MD
Gastroenterology
UW Medical Center
Cynthia Geary
Two-time Emmy-nominated actress
Northern Exposure
Before you get started
Good questions.
Clear answers.
Ask us a question What is Nevia?
A gut-health wearable in development, designed to support digestive comfort and everyday calm through non-invasive vagus nerve stimulation at the neck and ear.
How is the gut connected to the brain?
Your gut and brain communicate through the gut–brain axis. The vagus nerve carries signals in both directions, making it central to Nevia’s approach. Explore the connection.
What does the daily routine involve?
Two-minute sessions, twice a day, using the neckband, earpiece and companion app. Full instructions will be supplied at launch. Two minutes is the session length, not the time to results.
What will stimulation feel like?
Nevia delivers electrical stimulation through skin contact. Before launch, we’ll share guidance on sensation, intensity, fit and first use.
Does Nevia replace medical treatment?
No. Nevia is being developed as a general wellness product. It is not intended to diagnose, treat, cure, or prevent disease, or replace prescribed care. Ask your clinician about suitability, especially if you have a health condition or an implanted medical device.
Has Nevia been clinically proven?
Nevia-specific clinical results are not yet available. The published studies referenced here evaluated other devices and protocols.
Can I buy Nevia now?
Not yet. Join the waitlist for launch updates. We’ll share pricing and availability before orders open. Signing up is not an order.
Will I need a subscription or accessories?
Nevia works with a companion app. We’ll confirm app access, any recurring costs, included accessories, charging and care details before launch.
Be part of what comes next
A little time
for your gut.
More room for your life.
Join the Nevia waitlist for launch updates and availability.