Condition · Evidence Hub
Vagus Nerve Stimulation for Gut Health
Does vagus nerve stimulation help with gut health? 54 human studies have investigated VNS for gut health, including 5 systematic reviews, 15 RCTs, and 26 controlled trials, published between 1990 and 2026, with 34 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.
5 systematic reviews · 15 RCTs · 26 controlled trials · 8 narrative reviews
Evidence by Tier
strongest → weakest
- 5Systematic reviews & meta-analyses
- 15Randomised controlled trials
- 26Controlled clinical trials
- 8Narrative & scoping reviews
Stimulation Method
- 31taVNS
- 18iVNS
- 5tcVNS
Research Momentum
34 of 54 studies (63%) published since 2022 — an actively growing evidence base.
The studies
54 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 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
RCTstaVNSThe vagus connection: exploring the neurobiology of brain-gut communication
Xing et al. · Journal of neurophysiology · 2026
RCTstaVNSRole 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
RCTstaVNSUnmet needs of drugs for irritable bowel syndrome and inflammatory bowel diseases: interest of vagus nerve stimulation and hypnosis
Bonaz · Inflammopharmacology · 2024
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
RCTstaVNSNoninvasive electrical neuromodulation for gastrointestinal motility disorders
Yin et al. · Expert review of gastroenterology & hepatology · 2023
RCTstcVNSTranscutaneous electrical stimulation for gastrointestinal motility disorders
Song et al. · Neurogastroenterology and motility · 2023
RCTstaVNSVagus Nerve Stimulation Relives Irritable Bowel Syndrome and the Associated Depression via α7nAChR-mediated Anti-inflammatory Pathway
Yan et al. · Neuroscience · 2023
RCTstaVNSThe Importance of Visceral Hypersensitivity in Irritable Bowel Syndrome-Plant Metabolites in IBS Treatment
Dudzińska et al. · Pharmaceuticals (Basel, Switzerland) · 2023
RCTstaVNSNon-invasive neuromodulation: an emerging intervention for visceral pain in gastrointestinal disorders
Alam et al. · Bioelectronic medicine · 2023
RCTstcVNSAnti-inflammatory effects of vagal nerve stimulation with a special attention to intestinal barrier dysfunction
Bonaz · Neurogastroenterology and motility · 2022
RCTstaVNS[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
RCTstaVNSThe Vagus Nerve in the Neuro-Immune Axis: Implications in the Pathology of the Gastrointestinal Tract
Bonaz et al. · Frontiers in immunology · 2017
RCTstaVNSEpithelial 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
RCTstaVNS[Intestinal sensitivity disorders and irritable bowel syndrome]
Mei · Gastroenterologie clinique et biologique · 1990
RCTstaVNSVagus Nerve and Gut-Brain Communication
Wang et al. · The Neuroscientist : a review journal bringing neurobiology, neurology and psychiatry · 2025
controlled trialstaVNSThe vagus nerve: An old but new player in brain-body communication
Ma et al. · Brain, behavior, and immunity · 2025
controlled trialstaVNSAuricular Vagus Nerve Stimulation for Gastrointestinal Disorders: Hope or Hype?
Keszthelyi · United European gastroenterology journal · 2025
controlled trialstaVNSTranscutaneous 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 trialsiVNSTargeting the Vagus Nerve to Treat Inflammatory Bowel Disease?
Bonaz et al. · Journal of Crohn's & colitis · 2023
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 trialstaVNSElectrical neuromodulation therapy for inflammatory bowel disease
Yasmin et al. · World journal of gastrointestinal pathophysiology · 2022
controlled trialsiVNSVagus nerve-mediated intestinal immune regulation: therapeutic implications of inflammatory bowel diseases
Mikami et al. · International immunology · 2022
controlled trialsiVNSVagus nerve stimulation for conservative therapy-refractive epilepsy and depression
Möbius et al. · Laryngo- rhino- otologie · 2022
controlled trialstaVNSTherapeutic Potential of Vagus Nerve Stimulation for Inflammatory Bowel Diseases
Bonaz et al. · Frontiers in neuroscience · 2021
controlled trialsiVNSThe brain-gut axis, inflammatory bowel disease and bioelectronic medicine
Eberhardson et al. · International immunology · 2021
controlled trialsiVNSAdvances in the Treatment of Cholinergic Anti-Inflammatory Pathways in Gastrointestinal Diseases by Electrical Stimulation of Vagus Nerve
Lei et al. · Digestion · 2021
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 trialsiVNSPotential of Electrical Neuromodulation for Inflammatory Bowel Disease
Cheng et al. · Inflammatory bowel diseases · 2020
controlled trialsiVNSEffect of transcutaneous vagus nerve stimulation on muscle activity in the gastrointestinal tract (transVaGa)
Hong et al. · International Journal of Colorectal Disease · 2019 · n = 14
controlled trialstaVNSBioelectric neuromodulation for gastrointestinal disorders: effectiveness and mechanisms
Payne et al. · Nature reviews. Gastroenterology & hepatology · 2019
controlled trialsiVNSVagus Nerve Stimulation at the Interface of Brain-Gut Interactions
Bonaz et al. · Cold Spring Harbor perspectives in medicine · 2019
controlled trialstaVNSElectroencephalographic 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 trialsiVNSIs-there a place for vagus nerve stimulation in inflammatory bowel diseases?
Bonaz · Bioelectronic medicine · 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 trialstcVNSRelationship 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 trialsiVNSTranscutaneous Auricular Vagus Nerve Stimulation: Efficacy, Applications, and Challenges in Mood Disorders and Autonomic Regulation-A Narrative Review
Croft et al. · Military medicine · 2025
narrative reviewstaVNSClinical applications and mechanisms of vagus nerve stimulation in the treatment of immune diseases: a review
Liu et al. · International journal of surgery (London, England) · 2025
narrative reviewsiVNSTranscutaneous Vagal Nerve Stimulation for Gastrointestinal Disorders
Yin · Journal of translational gastroenterology · 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 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 reviewstaVNSInflammatory Bowel Disease: Role of Vagus Nerve Stimulation
Fornaro et al. · Journal of clinical medicine · 2022
narrative reviewsiVNSThe vagus nerve at the interface of the microbiota-gut-brain axis
Bonaz et al. · Frontiers in Neuroscience · 2018
narrative reviewsiVNSFunctional and chemical anatomy of the afferent vagal system
Berthoud & Neuhuber · Autonomic Neuroscience · 2000
narrative reviewsiVNS