---
id: kb-2026-00425
title: Gut Microbiome
schema_type: TechArticle
category: health
language: en
confidence: medium
last_verified: '2026-05-28'
created_date: '2026-05-22'
generation_method: ai_assisted
ai_models:
  - claude-opus
derived_from_human_seed: true
conflict_of_interest: none_declared
is_live_document: false
data_period: static
atomic_facts:
  - id: fact-health-001
    statement: >-
      The NIH Human Microbiome Project was created to characterize microbial communities found in
      and on the human body.
    source_title: Human Microbiome Project
    source_url: https://commonfund.nih.gov/hmp
    confidence: medium
  - id: fact-health-002
    statement: >-
      The 2012 HMP Nature paper analyzed the structure, function, and diversity of microbiomes in
      healthy human subjects.
    source_title: Structure, function and diversity of the healthy human microbiome
    source_url: https://www.nature.com/articles/nature11234
    confidence: medium
  - id: fact-health-003
    statement: >-
      NCCIH describes probiotics as live microorganisms that may have health benefits in adequate
      amounts, while effects depend on the specific strain and condition.
    source_title: 'Probiotics: Usefulness and Safety'
    source_url: https://www.nccih.nih.gov/health/probiotics-usefulness-and-safety
    confidence: medium
completeness: 0.88
known_gaps:
  - >-
    Coverage intentionally narrowed to directly sourced public evidence; adjacent subtopics are not
    exhaustively covered.
disputed_statements: []
primary_sources:
  - title: Human Microbiome Project
    type: government_document
    year: 2026
    url: https://commonfund.nih.gov/hmp
    institution: NIH Common Fund
  - title: Structure, function and diversity of the healthy human microbiome
    type: academic_paper
    year: 2012
    url: https://www.nature.com/articles/nature11234
    institution: Nature
  - title: 'Probiotics: Usefulness and Safety'
    type: government_document
    year: 2026
    url: https://www.nccih.nih.gov/health/probiotics-usefulness-and-safety
    institution: National Center for Complementary and Integrative Health
secondary_sources: []
updated: '2026-05-28'
---
## TL;DR

The gut microbiome is part of the broader human microbiome: microbial communities and their genes, functions, and interactions with the host. This repair removes unsupported health claims and focuses on HMP-backed findings.

## Core Explanation

The Human Microbiome Project created reference resources for studying microbial communities in and on healthy humans. Later HMP work expanded toward dynamic host-microbiome interactions, while probiotic guidance remains condition- and strain-specific rather than a broad wellness guarantee.

## Further Reading

- [Human Microbiome Project](https://commonfund.nih.gov/hmp)
- [Structure, function and diversity of the healthy human microbiome](https://www.nature.com/articles/nature11234)
- [Probiotics: Usefulness and Safety](https://www.nccih.nih.gov/health/probiotics-usefulness-and-safety)

## Related Articles

- [The Microbiome: Gut Bacteria, Immunity, and the Gut-Brain Axis](../../science/the-microbiome-gut-bacteria-immunity-and-the-gut-brain-axis.md)
- [Fermentation: Biochemistry, Industrial Applications, and Gut Health](../../science/fermentation-biochemistry-industrial-applications-and-gut-health.md)