#breath-tests

Hydrogen Sulfide SIBO: Symptoms, Testing and Treatment

What hydrogen sulfide SIBO is, why standard breath tests miss it, the three-gas test and its 3 ppm cut-off, and how it is treated, based on current research.

Methane SIBO (IMO): Causes, Symptoms, Testing and Treatment

Methane SIBO, now called intestinal methanogen overgrowth (IMO): why it causes constipation, how breath tests diagnose it, and how it is treated.

How SIBO Is Diagnosed: Which Test and When

How doctors diagnose SIBO: who should be tested, breath tests vs. small-intestinal fluid culture, what other tests add, and how to make sense of the results.

SIBO Breath Tests

How SIBO breath tests work: glucose vs. lactulose, how to prepare, the official cut-offs for hydrogen, methane and hydrogen sulfide, and how accurate they are.

The endoscopy test for small intestinal bacterial overgrowth

How small-intestinal fluid culture during endoscopy diagnoses SIBO: the procedure, the 1,000 CFU/mL cut-off, what sequencing shows, and the test's limits.