Patients with persistent digestive symptoms often go through multiple tests that look at structure, blood markers, or transit time. None of them measure how much acid your stomach is actually producing, or how quickly it recovers after a challenge. That is what makes the Heidelberg test different. Here is how it compares to every other method available.
Every other method on this list measures something around stomach acid: the structure of the lining, markers in the blood, acid in the wrong place, or a subjective feeling. The Heidelberg test is the only commercially available method that measures gastric acid secretion itself, in real time, through a standardized challenge protocol.
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.