We’ve noticed several great resources—podcasts, interviews, and PDFs—that once directed here but no longer work. If you came through them, you’re likely searching for insights from Dr. Greg Nigh on sulfur dysregulation, hydrogen sulfide / SIBO, detox protocols, or related environmental influences.
You’ve come to the right place. Here’s a fresh, updated guide pulling together all those topics + what you can do now to get clear, personalized support.
Download Dr. Greg Nigh’s Updated Guide to Sulfur & Gut BalanceA form of small intestinal bacterial overgrowth (SIBO) where sulfur-reducing bacteria produce excess hydrogen sulfide (H₂S) gas in the gut. Results often include diarrhea, foul-smelling gas, cramping, and systemic symptoms like fatigue or brain fog. It’s increasingly recognized as distinct from other SIBO types.
Standard breath testing measures only hydrogen & methane; when both are flat or very low, it may hide an H₂S-dominant case. Nil or flatline results + characteristic symptoms (diarrhea, sulfur odor, gut pain) may suggest need for specialized testing.
| Test | What It Tests | Best Use Cases |
|---|---|---|
| Trio-Smart breath test | Measures hydrogen, methane, and hydrogen sulfide gases in one test | Use when symptoms include sulfur smell, diarrhea, or when standard tests are negative despite symptoms. |
| 3-Hour Lactulose / Glucose breath tests | Hydrogen + Methane only | Helps identify hydrogen or methane-dominant SIBO; less useful for H₂S unless pattern is flat. |
Yes—specialized tests like Trio-Smart make it possible. But sample handling, timing, diet, and prior antibiotic/supplement use can all affect accuracy.
Often within 5 to 7 days some symptom worsening (“sulfur dump”) followed by improvement; the full initial protocol typically lasts about two weeks.
Yes—once you understand your tolerance. Gradual reintroduction and ongoing support with nutrients or supplementation helps many reclaim some dietary flexibility.
Want to start with something low-effort?
Download the Free Sulfur & Gut Reset GuideDoctor Nigh’s business phone line is currently unable to receive calls. It will be functional again on Wednesday, March 18. If you need to deliver a message or request a consultation please email drnigh-info@gregnigh.com.
Sorry for the inconvenience.
