Stomach Acid Matters.

Measure it.

The Heidelberg pH Diagnostic Test is the original FDA-cleared gastric pH diagnostic test — trusted by clinicians, researchers, and patients for over 45 years.

Now returning in 2026 with modern production, expanded availability, and renewed clinical relevance.

⚠️ Please note: Full testing availability resumes in January 2026. Limited access may apply until then.

Join the waitlist to be notified when scheduling opens.

What is the Heidelberg Test?

The Heidelberg pH Diagnostic Test is a non-invasive, FDA-cleared method for measuring stomach acid — not guessing.

It’s the only test that tracks acid production, pH levels, and motility in real time using a wireless capsule.

Why it matters:

  • Symptoms like reflux, bloating, nausea, or chronic gut issues aren’t always caused by too much acid.

  • In many cases, low acid is the real problem — and this test shows you exactly what’s happening.

Choose Your Path

  • For Patients

    Learn how this test can help uncover the root cause of your symptoms — especially when nothing else has.

    Learn More

  • For Providers

    Bring the Heidelberg Test into your clinical practice. Whether functional, integrative, or GI-based — our new platform is launching soon.

    Become a Provider

  • For Researchers & Pharma

    Explore how Heidelberg's precise pH profiling supports drug development, PPI studies, and acid suppression research.

    Partner with us

A Legacy Returns

Born from NASA-based research.
Refined in over one million clinical cases.
Now returning with a renewed mission: to bring precision back to digestive medicine.

Heidelberg Medical is currently completing its relaunch phase. Our new generation of capsule-based diagnostics will begin shipping and testing in January 2026.