The science

The gut and the brain are one circuit.
Medicine finally agrees.

Disorders of gut-brain interaction affect 42.2 percent of adults under the Rome Foundation's 2026 criteria. This page lays out the evidence behind that statement, the framework we formulate against, the standards we hold ourselves to, and the published record of the physician who built it.

Read the evidence briefs Our methods and limits
42.2% Adults meeting gut-brain criteria (Rome, 2026)
26+ Peer-reviewed publications, formulation lead
6 Ingredient evidence briefs
Clinical background

The published record, 2019 to 2026.

2019

Neuromodulators demonstrate efficacy in functional GI presentations.

Emergency physicians documented durable relief of refractory nausea, cyclic vomiting, and chronic abdominal pain using dopamine-antagonist medications, including droperidol and haloperidol, in patients unresponsive to conventional antiemetics. A November 2019 review in Emergency Medicine News summarized the proposed mechanism: dopamine blockade at the chemoreceptor trigger zone, the brainstem region governing nausea, together with altered gut motility and reduced central amplification of visceral signals.

The clinical implication is structural: the gut and the brain operate as a single circuit, and intervening on the neural side of that circuit produces measurable gastrointestinal effects.

Pescatore R. What to D.O.: Neuroleptic and Psychotropic Drugs for Abdominal Presentations. Emergency Medicine News, November 2019 ↗
2024

GRACE-4 formalizes gut-brain treatment in emergency medicine.

The Society for Academic Emergency Medicine published GRACE-4, an evidence-graded clinical guideline developed under GRADE methodology. Among its recommendations: dopamine-antagonist therapy for cannabinoid hyperemesis syndrome, a severe cyclic vomiting condition. The guideline marked the first time a major emergency medicine body formally codified treatment of a gastrointestinal syndrome through the nervous system.

An accompanying editorial in Emergency Medicine News, GRACE-4 as a Call to Action, argued that the specialty could no longer discharge these patients with normal labs and no framework.

Borgundvaag B, et al. GRACE-4: Alcohol use disorder and cannabinoid hyperemesis syndrome management in the emergency department. Academic Emergency Medicine, 2024 ↗ Pescatore R. GRACE-4 as a Call to Action. Emergency Medicine News, August 2024 ↗
2026

Rome V defines the category and quantifies its prevalence.

The Rome Foundation, the international body that sets diagnostic criteria for these conditions, classifies them as disorders of gut-brain interaction. Its 2026 criteria estimate that 42.2 percent of adults worldwide meet criteria for at least one.

MGB+ applies the same nervous-system-first formulation logic in over-the-counter form: nutrients and botanicals selected for their documented activity along the gut-brain axis, at disclosed doses, with the supporting evidence summarized in the briefs below. MGB+ is not a neuroleptic and does not diagnose, treat, cure, or prevent any disease.

Rome Foundation. Rome V diagnostic criteria for disorders of gut-brain interaction, 2026.
Rick Pescatore, DO
Author of record Rick Pescatore, DO Emergency physician · Editor-in-Chief, Emergency Medicine News · 26+ peer-reviewed publications · Formulation lead, BellyMD
Google Scholar ↗ Merck Manual author page ↗ Emergency Medicine News ↗
The evidence library

Six ingredients. Nothing hidden.

A plain-English brief for each ingredient doing the heavy lifting, citing the published research it rests on. No proprietary blends, no mystery dosing.

In MGB+ Clear

Allithiamine

A fat-soluble form of vitamin B1 selected for nervous-system support and metabolic energy pathways. Included in Clear for the bloat + brain-fog pattern.

Fat-soluble B1 form
Read the brief
In MGB+ Clear

PEA (Palmitoylethanolamide)

A molecule your body already makes, studied for neuroimmune signaling, discomfort sensitivity, and central-sensitization research. Included in Clear for the bloat + fog pattern.

Endogenous fatty acid amide
Read the brief
In MGB+ Cool

Mastic gum

A resin from Chios, Greece, traditionally used for upper-GI comfort and studied in gastric surface and microbial-balance research. Included in Cool for heavy, hot, post-meal upper-gut symptoms.

Chios resin upper-GI support
Read the brief
In MGB+ Cool

Zinc-carnosine

A chelated zinc complex studied for gastric mucosal support. Included in Cool for the stomach-lining side of the upper-gut pattern.

Mucosal support research
Read the brief
In MGB+ Calm

Ginger Root Extract 4:1

A concentrated ginger extract used for nausea-prone, slow-emptying, unsettled-stomach patterns. Included in Calm for queasy mornings and motion-sensitive gut-brain loops.

4:1 concentrated extract
Read the brief
In MGB+ Calm

Beta-caryophyllene

A non-psychoactive terpene found in black pepper and clove, studied for CB2-related signaling. Included in Calm for the inflammatory-sensitivity side of the gut-brain loop.

CB2 non-psychoactive pathway
Read the brief

These briefs summarize peer-reviewed research and formulation rationale. They are not a substitute for medical advice. The statements have not been evaluated by the Food and Drug Administration. MGB+ is not intended to diagnose, treat, cure, or prevent any disease.

The BellyMD framework

A clinical framework, not a wellness grab bag.

Why the formulas exist, in the order that matters: pattern first, mechanism second, ingredients third.

  1. 1
    Step 1

    Start with the pattern.

    We do not treat every stomach complaint like the same problem. BellyMD starts with the pattern: lower-gut bloat and fog, upper-gut heat after meals, or nausea and queasiness that seem wired into stress, sleep, or hormones.

  2. 2
    Step 2

    Map the gut-brain loop.

    The gut and brain talk through nerves, immune signaling, hormones, motility, and the microbiome. When that loop gets noisy, symptoms cluster. The formula has to match the direction the pattern is running.

  3. 3
    Step 3

    Give every molecule a job.

    No proprietary blend. No decorative botanicals. Every ingredient gets a listed dose, a reason to be there, and a short evidence brief that explains the role in plain English.

  4. 4
    Step 4

    Use a real trial window.

    A gut-brain pattern rarely shifts overnight. The honest test is consistency, tracking, and an 8 to 12 week window. That is why the BellyMD guarantee is built around 12 weeks.

ER physician-formulated  ·  Transparent doses  ·  Third-party tested  ·  12-week money-back guarantee
Methods & limits

What we hold ourselves to. And what we won't claim.

Our standards

  1. Human evidence first. Each brief is built on published human research where it exists and mechanistic data where it doesn't, and it says which is which.
  2. Doses that track the data. Ingredients are included at amounts consistent with the cited literature, and every dose is printed on the label.
  3. Full disclosure. No proprietary blends. The label is the complete recipe.
  4. Independent testing. Every batch is tested by an outside lab for potency, heavy metals, and contaminants. Certificates of analysis are available on request.

Honest limits

  1. Supplements, not drugs. MGB+ supports normal gut-brain function. It does not diagnose, treat, cure, or prevent any disease.
  2. Evidence evolves. The briefs are updated as the literature develops. We would rather revise than overclaim.
  3. People vary. The same pattern does not guarantee the same response. That uncertainty is why the guarantee runs 12 weeks.
  4. Alongside your clinician, not instead. If you are under care for a GI condition, MGB+ works with that plan, not in place of it.
The review layer

Clinical eyes on the framework.

Independent clinicians who reviewed the BellyMD framework and the evidence behind the formulas. Not paid endorsers.

Joshua D. Niforatos, M.D., M.T.S.

Joshua D. Niforatos, M.D., M.T.S.

Emergency physician and meta-researcher at Hopkins. His JAMA Internal Medicine work on evidence quality shapes how clinicians evaluate gut-brain treatments.

Johns Hopkins School of Medicine

LinkedIn ↗
Sergey M. Motov, M.D.

Sergey M. Motov, M.D.

Emergency physician whose 2015 Annals trial changed how ED doctors treat pain. Practices at Maimonides in Brooklyn.

Maimonides Medical Center, Brooklyn

LinkedIn ↗
Patrick Reeves, M.D.

Patrick Reeves, M.D.

Army pediatric gastroenterologist. Built the Clinical Action Plans toolkit that brings structured GI care to military families.

Brooke Army Medical Center

LinkedIn ↗
Suzanne Enright, M.Ed.

Suzanne Enright, M.Ed.

Behavior analyst and clinician. Decades of designing individualized care plans for children and adults living with chronic illness, and leading the multidisciplinary teams that put them into daily practice.

Behavior Analysis & Special Education

Her story →
Science FAQ

Common questions about the evidence.

Where can I read the studies?

Each ingredient block links to a free PDF brief. The briefs summarize the papers and formulation logic behind the ingredient, dose, and role in the formula.

How is this different from other supplements?

Most supplement pages start with ingredients. BellyMD starts with the pattern: what you feel, when it happens, and which side of the gut-brain loop it resembles. Then the formula is built from disclosed ingredients with specific jobs.

What does third-party tested mean?

An independent laboratory checks every batch for ingredient potency, heavy metals, and contaminants. Not the same lab that makes the supplement. We use US cGMP facilities.

Does BellyMD diagnose or treat disease?

No. BellyMD is not a diagnostic tool. The framework is a way to match everyday gut-brain symptom patterns to the most relevant formula. Red flags, severe symptoms, weight loss, bleeding, persistent vomiting, or new symptoms deserve medical care.

What's the 12-week money-back guarantee?

Twelve weeks is the realistic window for a gut-brain pattern to shift. If yours has not moved by then, email us within 90 days of your first order. We refund it in full — no bottle return required. If you would rather swap formulas than refund, we can do that too.

If one of these patterns sounds like yours.

The quiz maps your pattern in about two minutes. No email, no diagnosis, just a starting point matched to the evidence above.

Map your pattern Or read how each formula is built →
The gut-brain newsletter

Smarter about your gut, every week.

One short email a week from an ER physician. Plain-language gut-brain science, what's actually new in Rome V, and the small daily choices that add up.

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