THE HEIDELBERG TEST

Your stomach acid, measured in real time.
The only test that can.

A single capsule. A definitive answer. The Heidelberg pH Capsule measures acid secretion as it happens — no blood draw, no scope, no guesswork.

1

Swallow

A vitamin-sized capsule

2

Measure

Real-time pH

3

Know

Your stomach acid

60+
YEARS IN USE
150+
PUBLICATIONS
1M+
TESTS PERFORMED
Class I
MEDICAL DEVICE

YOUR SYMPTOMS

Does this sound familiar?

Years on acid medication. Still burning.

You were told you had too much acid. You took the medication. Months turned into years. The symptoms never fully resolved. Nobody measured whether acid was actually the problem.

Learn about reflux and stomach acid →

Treated for SIBO. Again.

The antimicrobials worked. For a while. Then the bloating returned, the breath test turned positive, and you started another round. Nobody checked whether your stomach acid was letting bacteria through in the first place.

Learn about SIBO and stomach acid →

Supplements that never seem to work.

Your B12 is low. Your iron won't budge. You take everything your practitioner recommends and your levels barely move. The problem may not be what you're taking. It may be what your stomach isn't doing with it.

Learn about nutrient malabsorption →

Normal labs. Real symptoms.

Bloating after every meal. Undigested food. Fatigue that no one can explain. Your bloodwork comes back fine. Your endoscopy is clean. But something is clearly wrong and nobody can tell you what.

Learn about low stomach acid →
CONDITIONS

Where stomach acid is part of the picture

Low Stomach Acid

When your symptoms don't match any diagnosis.

Reflux That Isn't What You Think

When the real problem is too little acid, not too much.

SIBO and Stomach Acid

Why bacterial overgrowth keeps returning.

Atrophic Gastritis

When the cells that make acid are being destroyed.

Bile Reflux

A different problem that looks like acid reflux.

Long-Term PPI Use

What's actually happening after years of suppression.

Nutrient Malabsorption

When supplements aren't absorbing no matter what you try.

Age-Related Acid Decline

The slow decline most people never discover.

Undigested Food

Visible proof that something upstream isn't working.

WHY IT MATTERS

Every condition above has one thing in common:
nobody measured the acid.

What changes when you know

A single test can reshape the conversation between you and your practitioner.

Stop guessing

Replace trial-and-error prescribing with a direct measurement of what your stomach is actually doing.

Understand why

If acid is already low, suppressing it further makes things worse. The data shows which direction to go.

Address the root

Bloating, reflux, SIBO, and deficiencies can all trace back to one cause. Knowing your acid status changes everything.

Find confidence

No more wondering whether the medication is right. You and your practitioner decide based on real evidence.

Stop guessing. Start measuring.

One test. One hour. A definitive answer about your stomach acid.

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HEIDELBERG

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The Heidelberg pH Capsule is a Class I medical device, 510(k)-exempt, listed with the U.S. Food and Drug Administration under 21 CFR §876.1400. Listing of a device does not denote FDA approval, clearance, or endorsement.

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