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Longevity Research, Simplified

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Latest Research

The most recent studies on longevity, supplements, and health optimization

SIFODiagnosis & TestingJul 18, 2026

Clinical Utility and Diagnostic Yield of Duodenal Versus Jejunal Aspirates for Small Intestinal Bacterial or Fungal Overgrowth.

Digestive diseases and sciences

n < 30Moderate QualityVerified Source

This study compared duodenal (upper small intestine) and jejunal (middle small intestine) fluid samples collected during the same procedure to diagnose SIBO and SIFO in 57 patients with gas and bloating. Both sampling sites detected the same proportion of positive cases (33%), but duodenal samples were faster to collect and showed good but not perfect agreement with jejunal samples.

Read Full Summary
RifaximinHerbal AntimicrobialsJul 1, 2026

Small Intestinal Bacterial Overgrowth: Microbiome Dysregulation, Gut-Brain Axis Disruption, and Systemic Consequences.

Molecular nutrition & food research

n < 30Moderate QualityVerified Source

This review examines SIBO (small intestinal bacterial overgrowth), a condition where too many bacteria colonize the small intestine, causing poor digestion and nutrient absorption. The authors explore how SIBO affects multiple body systems beyond the gut—including the brain, heart, skin, and immune system—and review current treatment approaches including antibiotics, dietary changes, and natural supplements.

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Methane SIBO (IMO)Diagnosis & TestingJun 29, 2026

Transcriptomics profiles in intestinal sulfide overproduction, small intestinal bacterial overgrowth, and intestinal methanogen overgrowth.

mSystems

n < 30Moderate QualityVerified Source

This study compared gene expression patterns in the small intestine of patients with intestinal sulfide overproduction (ISO), small intestinal bacterial overgrowth (SIBO), and intestinal methanogen overgrowth (IMO). ISO patients showed the most significant changes in gene activity, particularly affecting cellular energy production and immune response, while SIBO and IMO had fewer effects on gene expression. These findings were partially confirmed in rats given hydrogen sulfide-producing bacteria.

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Breath TestingCrohn's DiseaseJun 26, 2026

Frequent exposure to biologics is associated with small intestinal bacterial overgrowth in patients with Crohn's disease: a retrospective case-control study.

PeerJ

n < 30Moderate QualityVerified Source

This study examined whether biologic medications used to treat Crohn's disease affect the risk of developing SIBO (small intestinal bacterial overgrowth). Researchers found that Crohn's patients who received biologics five or more times had over four times higher odds of testing positive for SIBO compared to those never exposed to biologics.

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