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Gas and the microbiome.

Mark Pimentel1, Ruchi Mathur, Christopher Chang

  • 1GI Motility Program, Division of Gastroenterology, Cedars-Sinai Medical Center, 8730 Alden Drive, Suite 201E, Los Angeles, CA, 90048, USA, pimentelm@cshs.org.

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Human gut microbes produce gases like hydrogen (H2), methane (CH4), and hydrogen sulfide (H2S). These gases impact gut health and can serve as diagnostic markers for conditions such as bacterial overgrowth.

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Area of Science:

  • Microbiology
  • Gastroenterology
  • Human Health

Background:

  • The human body hosts trillions of microbes crucial for health and disease.
  • Advances in technology have expanded knowledge of microbial communities and their functions.
  • Gut microbes play roles in nutrient breakdown, vitamin synthesis, and immune modulation.

Purpose of the Study:

  • To review the roles and effects of key gases produced by gut microbes.
  • To explore the impact of hydrogen (H2), methane (CH4), and hydrogen sulfide (H2S) on the human gut.
  • To discuss the potential of these gases as diagnostic markers.

Main Methods:

  • Literature review of scientific articles on gut microbial gases.
  • Analysis of studies investigating the physiological effects of H2, CH4, and H2S.
  • Examination of research on gas-based diagnostic methods, such as breath testing.

Main Results:

  • Gut fermentation by bacteria and archaea generates gases like H2, CH4, and H2S.
  • These gases exert direct and indirect influences on gut physiology and health.
  • Gas production, particularly hydrogen, is a recognized biomarker for diagnosing conditions like bacterial overgrowth.

Conclusions:

  • Microbial gases are integral to gut function and human health.
  • Understanding these gases offers insights into gut homeostasis and disease.
  • Further research into microbial gas production and detection holds diagnostic potential.