Founder review · MGB+ Cool

I'm an ER doctor. I ranked 8 gut supplements. Here's what won.

I built one of them. I'll tell you which. Here's how they all scored.

Rick Pescatore, D.O.

Founder, BellyMD · ER physician

Physician-formulated·Made in USA·Lab tested·12-week refund

See the ranking

MGB+ Cool, the supplement Rick Pescatore built for what acid blockers don't touch

Founder review

The ranking

Eight products. Seven checks. One winner.

Swipe through. Same seven checks, every product. Cool does not win all of them.

What I scored on

Dose · Mechanisms · B1 form · Label honesty · Fillers · Lab tested · Cost

WINNER

★★★★★ 4.7 / 5

MGB+ Cool

Built for what acid blockers don't touch.

$79.00 one-time · or the 90-day protocol at $129.00, $1.43 a day

✅ Dose: Mastic gum 500mg, allithiamine 150mg. Study-grade.
✅ Mechanisms: Lining, motility, immune signal, nerves. Four in one.
✅ B1 form: Allithiamine. Fat-soluble. Absorbs far better.
✅ Label honesty: Every dose in mg. No blends.
✅ Fillers: None.
✅ Lab tested: Every batch.
❌ Cost: The most expensive thing on this page.

I'm biased. I built it. So here is the honest knock: it is the most expensive thing on this page, and if you only need one mechanism, buy the cheap single ingredient. I would tell you that in the room. Cool costs more because it is doing four things at once, and that is the only reason it is worth it.

Try Cool with COOL15

RUNNER-UP

★★★★☆ 4.3 / 5

Jarrow Mastic Gum

Right ingredient, alone.

~$28

✅ Dose: 500mg, the studied dose.
❌ Mechanisms: One.
❌ B1 form: None.
✅ Label honesty: Clear.
⚠️ Fillers: Magnesium stearate.
⚠️ Lab tested: Brand-asserted.
✅ Cost: About a third of Cool.

Right ingredient. Wrong stack. You'd need three more bottles to match Cool.

3RD

★★★★☆ 4.1 / 5

Seed DS-01

Great product. Wrong job.

$49.99/mo

✅ Dose: For probiotics.
❌ Mechanisms: Probiotic only.
❌ B1 form: None.
✅ Label honesty: Strain-level.
✅ Fillers: None.
✅ Lab tested: Yes.
❌ Cost: Subscription only, and it adds up.

Built for general microbiome. Not for the heavy, burning, after-meal pattern.

4TH

★★★★☆ 4.0 / 5

PepZin GI

One ingredient, well-dosed.

~$22

✅ Dose: 75mg zinc-carnosine.
❌ Mechanisms: One.
❌ B1 form: None.
✅ Label honesty: Clear.
⚠️ Fillers: Cellulose, stearate.
⚠️ Lab tested: Limited public data.
✅ Cost: The cheapest way to buy this one mechanism.

One layer covered well. Cool is built for all four.

5TH

★★★☆☆ 3.8 / 5

NOW Foods DGL

Cheap, narrow, honest.

~$10

✅ Dose: 400mg DGL.
❌ Mechanisms: One.
❌ B1 form: None.
✅ Label honesty: Clear.
⚠️ Fillers: Sorbitol, flavor.
✅ Lab tested: In-house.
✅ Cost: Pennies a day.

Honest product, fair price. Same gap: one mechanism, not the stack.

6TH

★★★★☆ 3.7 / 5

Designs for Health GI-Revive

Real brand. Hidden doses.

~$60

❌ Dose: Hidden in a blend.
✅ Mechanisms: Yes.
❌ B1 form: None.
❌ Label honesty: Blend hides amounts.
✅ Fillers: None disclosed.
✅ Lab tested: GMP facility.
➖ Cost: Mid, and you are paying for breadth you may not need.

This one bugs me most. You can't see how much of anything you're taking. That's a line.

7TH

★★★☆☆ 3.4 / 5

AG1

Famous. Wrong category.

$99/mo

❌ Dose: 75 ingredients, most too small to do much.
❌ Mechanisms: A multivitamin, not gut-targeted.
❌ B1 form: Water-soluble. Absorption drops as the dose climbs.
❌ Label honesty: Blends throughout.
✅ Fillers: None added.
✅ Lab tested: NSF certified.
❌ Cost: The most expensive per month of anything here.

Good brand, wrong product. AG1 doesn't have a real dose of anything that calms the upper gut.

8TH

★★☆☆☆ 3.0 / 5

Pepto-Bismol

Symptom mask. Not daily.

~$10

✅ Dose: At label dose.
❌ Mechanisms: Coats and dampens. Doesn't shift the pattern.
❌ B1 form: None.
✅ Label honesty: FDA-regulated.
⚠️ Fillers: Salicylate-sensitive should avoid.
✅ Lab tested: FDA-regulated.
✅ Cost: Cheapest on the page. It is also not a fix.

Works for two days at a time. Cool is for the pattern that keeps sending you back to the Pepto.

Cool is a supplement, not a replacement for any medication you take. Comparisons reflect public product labels.

Founder note

This is what I built it for.

Ten years in the ER. Same patient, same upper-gut pattern, sent home on another acid blocker that doesn't fix the lining, the motility, or the signaling underneath.

Cool was built for those four layers. If the ranking lined up with the gut you live with, this is the one to try. 12 weeks. If nothing shifts, we refund it.

Rick Pescatore, D.O.

Founder, BellyMD · ER physician

Try MGB+ Cool with COOL15 Not sure? Take the 60-second quiz

12-week refund · free shipping on every order

Stack the formula

Pair Cool with the rest of the line.

Most people start with one bottle. If a different pattern keeps showing up, the formulas are built to stack on one subscription cadence. Save when you bundle any Duo or the Trio.

Save as a Duo

Add Clear as a Duo

For the days the burn travels into bloating and brain fog. Save $49 on the pair.

Save $49 →

Save as a Duo

Add Calm as a Duo

For mornings that start with the stomach turning. Save $49 on the pair.

Save $49 →

Save on the Trio

Get the Core Trio

All three formulas, one order. The best per-bottle price in the line.

See the Trio →

Common questions

What people ask before they buy.

How long until I feel something?

Ginger acts fast. Most people notice less post-meal burn in the first week. The lining-support layer takes four to twelve weeks. If nothing has shifted by week twelve, we refund it.

Can I take Cool with my acid blocker?

Yes. Cool works alongside acid blockers, not against them. The acid blocker handles acid. Cool handles the lining, motility, and immune signal. Talk to your doctor before changing any prescribed medication.

I've tried mastic gum and it didn't work. Why is this different?

Two reasons. The dose: most products use 200mg or less. Cool uses 500mg, the studied dose. And mastic alone works one layer. Cool adds six more active ingredients to cover the other three.

Any fillers, dyes, or seed oils?

None. Plant capsule. No dyes, no seed oils, no talc, no magnesium stearate.

What's the 12-week guarantee?

Twelve weeks is the real window for an upper-gut pattern to shift. If yours hasn't moved by then, email us within 12 weeks of delivery and we refund your first order, up to three bottles. No bottle return.

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