Condition · Evidence Hub
Vagus Nerve Stimulation for Gut Health
Does vagus nerve stimulation help with gut health? 52 human studies have investigated VNS for gut health, including 6 systematic reviews, 6 RCTs, and 12 controlled trials, published between 1990 and 2026, with 33 published since 2022. Studies use transcutaneous auricular (taVNS), implanted (iVNS), and transcutaneous cervical (tcVNS) stimulation. Findings vary by study design and population; the studies below are ranked by evidence strength so you can weigh the research directly.
6 systematic reviews · 6 RCTs · 12 controlled trials · 28 narrative reviews
Evidence by Tier
strongest → weakest
- 6Systematic reviews & meta-analyses
- 6Randomised controlled trials
- 12Controlled clinical trials
- 28Narrative & scoping reviews
Stimulation Method
- 29taVNS
- 17iVNS
- 6tcVNS
Research Momentum
33 of 52 studies (63%) published since 2022 — an actively growing evidence base.
The studies
52 studies · strongest evidence firstVagal Nerve Stimulation for Chronic Constipation: A Systematic Review and Meta-Analysis of Randomized Controlled Trials
Saleh et al. · Neuromodulation : journal of the International Neuromodulation Society · 2026 · n = 356
systematic reviewstaVNSTranscutaneous auricular vagus nerve stimulation for functional dyspepsia: A systematic review and meta-analysis
Lee et al. · Complementary therapies in medicine · 2025 · n = 716
systematic reviewstaVNSEfficacy of vagus nerve stimulation in gastrointestinal disorders: a systematic review
Veldman et al. · Gastroenterology report · 2025 · n = 644
systematic reviewstcVNSVagus nerve stimulation in autoimmune conditions: a systematic review
Lombo et al. · ACR Open Rheumatology · 2025
systematic reviewsiVNSAssessing the therapeutic potential of vagus nerve stimulation in autoimmune diseases: A systematic review
Chan et al. · Physiological reports · 2025
systematic reviewsiVNSVagus Nerve Stimulation and Sacral Nerve Stimulation for Inflammatory Bowel Disease: A Systematic Review
Pikov · Journal of translational gastroenterology · 2023
systematic reviewstaVNSTranscutaneous auricular vagal nerve stimulation improves functional dyspepsia with sleep disturbance via enhanced vagal activity: a randomized controlled trial
Li et al. · International journal of surgery (London, England) · 2026 · n = 54
RCTstaVNSTranscutaneous Auricular Vagal Nerve Stimulation Is Effective for the Treatment of Functional Dyspepsia: A Multicenter, Randomized Controlled Study
Shi et al. · The American journal of gastroenterology · 2024 · n = 300
RCTstaVNSEfficacy and Safety of Transcutaneous Auricular Vagus Nerve Stimulation in Patients With Constipation-Predominant Irritable Bowel Syndrome: A Single-Center, Single-Blind, Randomized Controlled Trial
Liu et al. · The American journal of gastroenterology · 2024 · n = 40
RCTstaVNSTranscutaneous vagal nerve stimulation for treating gastrointestinal symptoms in individuals with diabetes: a randomised, double-blind, sham-controlled, multicentre trial
Kornum et al. · Diabetologia · 2024
RCTstaVNSVagus Nerve Stimulation Relives Irritable Bowel Syndrome and the Associated Depression via α7nAChR-mediated Anti-inflammatory Pathway
Yan et al. · Neuroscience · 2023
RCTstaVNS[Intestinal sensitivity disorders and irritable bowel syndrome]
Mei · Gastroenterologie clinique et biologique · 1990
RCTstaVNSTranscutaneous vagus nerve stimulation does not affect gastrointestinal function in subjects with diabetic autonomic neuropathy
Kahlke et al. · Scandinavian journal of gastroenterology · 2025
controlled trialstaVNSExploring the efficacy of Transcutaneous Auricular Vagus nerve stimulation (taVNS) in modulating local and systemic inflammation in experimental models of colitis
Hesampour et al. · Bioelectronic medicine · 2024
controlled trialstaVNSStress-sensitive neural circuits change the gut microbiome via duodenal glands
Chang et al. · Cell · 2024
controlled trialstaVNSNeuroimmune Modulation Through Vagus Nerve Stimulation Reduces Inflammatory Activity in Crohn's Disease Patients: A Prospective Open-label Study
D'Haens et al. · Journal of Crohn's & colitis · 2023 · n = 15
controlled trialsiVNSImpact of auricular percutaneous electrical nerve field stimulation on gut microbiome in adolescents with irritable bowel syndrome: A pilot study
Bora et al. · Journal of digestive diseases · 2023
controlled trialstaVNSOpen-label pilot study: Non-invasive vagal nerve stimulation improves symptoms and gastric emptying in patients with idiopathic gastroparesis
Gottfried-Blackmore et al. · Neurogastroenterology and motility · 2020 · n = 15
controlled trialstcVNSTranscutaneous Auricular Vagus Nerve Stimulation for the Treatment of Irritable Bowel Syndrome: A Pilot, Open-Label Study
Mion et al. · Bioelectronics in Medicine · 2020 · n = 12
controlled trialstaVNSA 12-month pilot study outcomes of vagus nerve stimulation in Crohn's disease
Sinniger et al. · Neurogastroenterology and motility · 2020
controlled trialstcVNSElectroencephalographic correlates of low-frequency vagus nerve stimulation therapy for Crohn's disease
Kibleur et al. · Clinical neurophysiology : official journal of the International Federation of Clinical Neurophysiology · 2018
controlled trialsiVNSProof of concept: short-term non-invasive cervical vagus nerve stimulation in patients with drug-refractory gastroparesis
Paulon et al. · Frontline gastroenterology · 2017 · n = 35
controlled trialstcVNSChronic vagus nerve stimulation in Crohn's disease: a 6-month follow-up pilot study
Bonaz et al. · Neurogastroenterology and Motility · 2016 · n = 7
controlled trialsiVNSRelationship between vagal tone, cortisol, TNF-alpha, epinephrine and negative affects in Crohn's disease and irritable bowel syndrome
Pellissier et al. · PLoS ONE · 2014 · n = 73
controlled trialsiVNSThe vagus connection: exploring the neurobiology of brain-gut communication
Xing et al. · Journal of neurophysiology · 2026
narrative reviewstaVNSTranscutaneous Vagal Nerve Stimulation for Gastrointestinal Disorders
Yin · Journal of translational gastroenterology · 2025
narrative reviewstaVNSRole of brain-gut axis in mechanism of gastrointestinal defense
Kwiecien et al. · Journal of physiology and pharmacology : an official journal of the Polish Physiological Society · 2025
narrative reviewstaVNSVagus Nerve and Gut-Brain Communication
Wang et al. · The Neuroscientist : a review journal bringing neurobiology, neurology and psychiatry · 2025
narrative reviewstaVNSThe vagus nerve: An old but new player in brain-body communication
Ma et al. · Brain, behavior, and immunity · 2025
narrative reviewstaVNSTranscutaneous auricular vagus nerve stimulation as an innovative approach for managing perioperative gastrointestinal dysfunction: a narrative review
Zhang et al. · Frontiers in medicine · 2025
narrative reviewstaVNSNeuromodulation and the Gut-Brain Axis: Therapeutic Mechanisms and Implications for Gastrointestinal and Neurological Disorders
Aljeradat et al. · Pathophysiology : the official journal of the International Society for Pathophysiology · 2024
narrative reviewsiVNSUnmet needs of drugs for irritable bowel syndrome and inflammatory bowel diseases: interest of vagus nerve stimulation and hypnosis
Bonaz · Inflammopharmacology · 2024
narrative reviewstaVNSTranscutaneous auricular vagus nerve stimulation as a novel therapy connecting the central and peripheral systems: a review
Zou et al. · International journal of surgery (London, England) · 2024
narrative reviewstaVNSNoninvasive electrical neuromodulation for gastrointestinal motility disorders
Yin et al. · Expert review of gastroenterology & hepatology · 2023
narrative reviewstcVNSTranscutaneous electrical stimulation for gastrointestinal motility disorders
Song et al. · Neurogastroenterology and motility · 2023
narrative reviewstaVNSThe Importance of Visceral Hypersensitivity in Irritable Bowel Syndrome-Plant Metabolites in IBS Treatment
Dudzińska et al. · Pharmaceuticals (Basel, Switzerland) · 2023
narrative reviewstaVNSNon-invasive neuromodulation: an emerging intervention for visceral pain in gastrointestinal disorders
Alam et al. · Bioelectronic medicine · 2023
narrative reviewstcVNSInflammatory Bowel Disease: Role of Vagus Nerve Stimulation
Fornaro et al. · Journal of clinical medicine · 2022
narrative reviewsiVNSElectrical neuromodulation therapy for inflammatory bowel disease
Yasmin et al. · World journal of gastrointestinal pathophysiology · 2022
narrative reviewsiVNSVagus nerve-mediated intestinal immune regulation: therapeutic implications of inflammatory bowel diseases
Mikami et al. · International immunology · 2022
narrative reviewsiVNSAnti-inflammatory effects of vagal nerve stimulation with a special attention to intestinal barrier dysfunction
Bonaz · Neurogastroenterology and motility · 2022
narrative reviewstaVNSTherapeutic Potential of Vagus Nerve Stimulation for Inflammatory Bowel Diseases
Bonaz et al. · Frontiers in neuroscience · 2021
narrative reviewsiVNSThe brain-gut axis, inflammatory bowel disease and bioelectronic medicine
Eberhardson et al. · International immunology · 2021
narrative reviewsiVNS[Research progress and problems of neurobiological mechanisms of acupuncture underlying improvement of irritable bowel syndrome]
Chen et al. · Zhen ci yan jiu = Acupuncture research · 2021
narrative reviewstaVNSPotential of Electrical Neuromodulation for Inflammatory Bowel Disease
Cheng et al. · Inflammatory bowel diseases · 2020
narrative reviewsiVNSBioelectric neuromodulation for gastrointestinal disorders: effectiveness and mechanisms
Payne et al. · Nature reviews. Gastroenterology & hepatology · 2019
narrative reviewsiVNSVagus Nerve Stimulation at the Interface of Brain-Gut Interactions
Bonaz et al. · Cold Spring Harbor perspectives in medicine · 2019
narrative reviewstaVNSThe vagus nerve at the interface of the microbiota-gut-brain axis
Bonaz et al. · Frontiers in Neuroscience · 2018
narrative reviewsiVNSIs-there a place for vagus nerve stimulation in inflammatory bowel diseases?
Bonaz · Bioelectronic medicine · 2018
narrative reviewsiVNSThe Vagus Nerve in the Neuro-Immune Axis: Implications in the Pathology of the Gastrointestinal Tract
Bonaz et al. · Frontiers in immunology · 2017
narrative reviewstaVNSEpithelial cells and their neighbors. II. New perspectives on efferent signaling between brain, neuroendocrine cells, and gut epithelial cells
Flemström et al. · American journal of physiology. Gastrointestinal and liver physiology · 2005
narrative reviewstaVNSFunctional and chemical anatomy of the afferent vagal system
Berthoud & Neuhuber · Autonomic Neuroscience · 2000
narrative reviewsiVNS