Mechanism of action

Nerva uses AI to integrate gut-directed hypnotherapy, cognitive-behavioral coaching, and diaphragmatic breathing to calm the brain, retrain gut perception, and restore healthy gut-brain communication.

Gut-directed hypnotherapy (GDH)

Uses therapeutic suggestions to modulate central pain pathways and alter cortical processing of visceral signals.

Cognitive behavioral therapy (CBT)

Employs cognitive and behavioral strategies to reduce symptom-focused fear and hypervigilance, enhancing adaptive coping and cognitive reappraisal.

Diaphragmatic breathing

Engages the vagus nerve and parasympathetic system to improve gastrointestinal motility and reduce visceral sensitivity.

How Nerva works

Improves pain processing

Hyperactivity in central pain and emotion networks is reduced, enabling the brain to respond more appropriately to visceral input.1


Reduces hypervigilance

Attention shifts away from visceral 
sensations, decreasing over-monitoring 
and excessive threat signaling.5

Reduces visceral hypersensitivity

GDH decreases sensitivity to gut stimuli (e.g., gas, distension, motility), often exacerbated by FODMAPs, thereby reducing pain and urgency.2


Normalizes gut motility

Gut contractility stabilizes and transit time is modulated, alleviating bloating, diarrhea, and constipation.3

Reduces stress and anxiety

GDH lowers cortisol levels and attenuates sympathetic activation, supporting
parasympathetic ‘rest-and-digest’ function.4

Improves brain-to-gut signaling

By enhancing vagal tone, GDH promotes 
more balanced efferent signaling 
from the brain to the gut.6

Reframes gut sensations

Cognitive suggestions mitigate catastrophizing and maladaptive interpretations, allowing typical visceral sensations to be  appraised as non-threatening.7

Components of a GDH session

Hypnotic induction

The deep relaxation phase shifts the body into a calm, focused state, making the brain more receptive to therapeutic input and reducing stress hormone levels.

Guided visualization

Gut-focused imagery (e.g., a calm river or warm light in the gut) trains the brain to reinterpret visceral sensations as safe. With repetition, this establishes automatic, reflex-like pathways that diminish reactivity without 
conscious effort.

Therapeutic suggestions

Symptom-specific cues are delivered while the brain is most receptive. Over time, these reshape subconscious responses to visceral input, promoting calm as the brain’s default state.

Hypnotic induction

The deep relaxation phase shifts the body into a calm, focused state, making the brain more receptive to therapeutic input and reducing stress hormone levels.

Guided visualization

Gut-focused imagery (e.g., a calm river or warm light in the gut) trains the brain to reinterpret visceral sensations as safe. With repetition, this establishes automatic, reflex-like pathways that diminish reactivity without 
conscious effort.

Therapeutic suggestions

Symptom-specific cues are delivered while the brain is most receptive. Over time, these reshape subconscious responses to visceral input, promoting calm as the brain’s default state.

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The balloon distension study: hypnotherapy increases gut pain tolerance

In this landmark mechanistic study, IBS patients underwent rectal balloon inflation before and after gut-directed hypnotherapy (GDH) to measure changes in visceral sensitivity.

After hypnotherapy, patients tolerated significantly greater balloon inflation volumes before reporting discomfort or pain.
This demonstrated that GDH reduces central sensitivity to gut signals, not just perceived symptom severity.
Explore more research

Request resources

Request patient resources, free samples, clinician access to the program, or a training call

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Your questions, answered.

What is the cost of the program?

The Nerva program costs $199 USD, $249 AUD, €229 EUR or £149 GBP for 12 months of access. However, patients referred by their healthcare practitioner receive a 25% discount.

Patients begin with a 7-day free trial to explore the program risk-free. For added peace of mind, we also offer a 42-day money-back guarantee.

Who is suitable for Nerva?

Nerva is designed for patients with IBS, including those with constipation (IBS-C), diarrhea (IBS-D), or mixed (IBS-M) subtypes. It is particularly beneficial for patients experiencing stress and/or anxiety, those seeking non-pharmacological or non-dietary interventions, and refractory patients who have not responded to other treatments.

Contraindications: Nerva is not recommended for individuals with severe psychiatric disorders, unresolved psychological trauma, or cognitive impairments.

For an in-depth guide, see our decision tool.

What is gut-directed hypnotherapy?

Gut-directed hypnotherapy (GDH) is a psychological therapy that helps regulate the gut-brain connection. It guides individuals into a state of focused attention, where individuals become more receptive to therapeutic suggestions. This heightened state of awareness helps regulate the gut-brain connection, easing IBS symptoms by shifting the body out of a stress response and into a state of calm.

During hypnosis, we can observe physiological changes in brain activity related to absorption, executive control, and awareness.

With self-hypnosis, patients can access these benefits anytime, anywhere – without the need for an in-person hypnotherapist – while remaining in complete control.

Can I access patient results?

Yes, patients can choose to add your details, allowing you to receive progress updates and reports, including IBS-SSS and PHQ-4 symptom tracking. These insights are securely delivered through our HIPAA-compliant and Australian Privacy Principles-compliant reporting system.

Does Nerva work for other DGBIs?

Nerva is specifically designed for diagnosed IBS, targeting the gut-brain connection through gut-directed hypnotherapy (GDH). While research supports the effectiveness of GDH for IBS, some patients with other disorders of gut-brain interaction (DGBIs), such as functional dyspepsia, may still benefit. However, as Nerva is not tailored for these conditions, we recommend patients consult their healthcare provider to determine the best approach for their needs.

Can I test the app as a practitioner?

Yes, we offer free clinician access, allowing you to explore the full Nerva program firsthand. This gives you insight into the structure, content, and experience your patients will have.

Gain free access here.

How long is the program?

Nerva follows a clinically-based 6-week program designed to improve IBS symptom management through gut-directed hypnotherapy.

To support long-term symptom management, patients receive a 12-month subscription – which includes ongoing access to our flare-up toolkit for maintenance and support whenever they need it.

Do you have a smart phrase template I can add to my EMR?

Here is a smart phrase template that's worked well for other practices when adding Nerva to discharge instructions:


I’m referring you to Nerva, a clinically validated gut-directed hypnotherapy program designed to help you manage IBS symptoms. Most patients see results within 6 weeks.

Visit: www.nervahealth.com

References

1. Löwen, M. B. O., Mayer, E. A., Sjöberg, M., Tillisch, K., Naliboff, B., Lundberg, P., … Simrén, M. (2013). Effect of hypnotherapy and educational intervention on brain response to visceral stimulus in the irritable bowel syndrome. Alimentary Pharmacology & Therapeutics, 37(12), 1184–1197. https://doi.org/10.1111/apt.12319 (europepmc.org)

2. Houghton, L. A., Calvert, E. L., Jackson, N. A., Cooper, P., & Whorwell, P. J. (2002). Visceral sensation and emotion: A study using hypnosis. Gut, 51(5), 701–707. https://doi.org/10.1136/gut.51.5.701 (gut.bmj.com)

3. Lindfors, P., Törnblom, H., Sadik, R., Björnsson, E. S., Abrahamsson, H., & Simrén, M. (2012). Effects on gastrointestinal transit and antroduodenojejunal manometry after gut-directed hypnotherapy in irritable bowel syndrome. Scandinavian Journal of Gastroenterology, 47(12), 1480–1487. https://doi.org/10.3109/00365521.2012.719727 (iris.rais.is)

4. Tan, G., Hammond, D. C., & Joseph, G. (2005). Hypnosis and irritable bowel syndrome: A review of efficacy and mechanism of action. American Journal of Clinical Hypnosis, 47(3), 161–178. https://doi.org/10.1080/00029157.2005.10404187 (neurofeedbackslc.com)

5. Labus, J. S., Bolus, R., Chang, L., Wiklund, I., Naesdal, J., Mayer, E. A., & Naliboff, B. D. (2004). The Visceral Sensitivity Index: Development and validation of a gastrointestinal symptom–specific anxiety scale. Alimentary Pharmacology & Therapeutics, 20(1), 89–97. https://doi.org/10.1111/j.1365-2036.2004.02007.x (onlinelibrary.wiley.com)

6. Moser, G., Truschel, M., et al. (2022). Heart-rate variability in patients with irritable bowel syndrome before and after gut-directed hypnotherapy (ClinicalTrials.gov Identifier NCT05283655). Unpublished clinical-trial report. (ichgcp.net)

7. Lackner, J. M., Jaccard, J., Krasner, S. S., Katz, L. A., et al. (2007). How does cognitive behavior therapy for irritable bowel syndrome work? A mediational analysis of a randomized clinical trial. Gastroenterology, 133(2), 433–444. https://doi.org/10.1053/j.gastro.2007.05.014 (scirp.org)