Evidence map›Paper›PMID 31196177›Full record

ReviewMicrobiome2019

Macronutrient metabolism by the human gut microbiome: major fermentation by-products and their impact on host health.

Kaitlyn Oliphant, Emma Allen-Vercoe

Abstract readReview
In one paragraph

Review in Microbiome, 2019. The graph could read no effect estimate from its abstract, so it casts no vote on the map. Cited by 643 papers, 1 of them a synthesis that pooled it.

0numbers the graph read from it
0cells of the map it votes in
643citing papers in PubMed, 1 pooled it
–field-weighted citation impact
1 · What the graph read from it

What it found

Each row is one number read from the abstract, on the scale the paper reported it, with its interval. Left of the dashed line favours the treatment, right favours the comparator. Under each row is the sentence it came from. New to these charts? A ten-minute tutorial.

The abstract states no effect estimate the extractor could read, or names no intervention and outcome on the map, so this paper lights no cell and moves no belief. It is still indexed, cited and linked below.

2 · The registry

The trial behind it

Trials whose registry record cites this paper, or whose number appears in the abstract. A trial that started after this paper was published is citing it as background, not reporting it.

Neither the registry nor the abstract names a trial number. If this is a trial report, that itself is worth knowing.

3 · Its place in the literature

Who cites it

643 citing papers in PubMed, 1 synthesis or guideline pooled it.

  1. Meta-Analysis of the Gut Microbiome: An African American Representation.International journal of environmental research and public health · 2025
    Pooled it
  2. Trial
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  6. Review
  7. Review
  8. Article
  9. Gut microbes · 2026
    Article
  10. Review
  11. Gut microbial alterations and functional shifts in patients with hypertriglyceridemia: insights from a northwestern Chinese metagenomic study.International microbiology : the official journal of the Spanish Society for Microbiology · 2026
    Article
  12. Article
  13. mSystems · 2026
    Article
  14. Short-chain fatty acids.Nature metabolism · 2026
    Review
  15. Article
  16. Article
  17. Article
  18. Article
  19. Article
  20. Article

583 more citing papers are in PubMed but not listed here.

4 · The record

Corrections and comments

PubMed lists nothing against this paper. Absence here is not a guarantee, only a check that was made.

5 · Who and what money

Authors and funding

2 authors.

Kaitlyn OliphantDepartment of Molecular and Cellular Biology, University of Guelph, 50 Stone Rd E, Guelph, ON, N1G 2W1, Canada. koliphan@uoguelph.ca.ORCID 0000-0002-6921-7094
Emma Allen-VercoeDepartment of Molecular and Cellular Biology, University of Guelph, 50 Stone Rd E, Guelph, ON, N1G 2W1, Canada.

Funding

Microbes that Matter: defining optimal formulations for Microbial Ecosystem TherapeuticsR33AI121575 · NIAID · QUEEN'S UNIVERSITY AT KINGSTON · PI ALLEN-VERCOE, EMMA, SHETH, PRAMEET · 2018 to 2020
$928k
NIAID NIH HHS R33 AI121575
6 · The paper itself

Abstract

The human gut microbiome is a critical component of digestion, breaking down complex carbohydrates, proteins, and to a lesser extent fats that reach the lower gastrointestinal tract. This process results in a multitude of microbial metabolites that can act both locally and systemically (after being absorbed into the bloodstream). The impact of these biochemicals on human health is complex, as both potentially beneficial and potentially toxic metabolites can be yielded from such microbial pathways, and in some cases, these effects are dependent upon the metabolite concentration or organ locality. The aim of this review is to summarize our current knowledge of how macronutrient metabolism by the gut microbiome influences human health. Metabolites to be discussed include short-chain fatty acids and alcohols (mainly yielded from monosaccharides); ammonia, branched-chain fatty acids, amines, sulfur compounds, phenols, and indoles (derived from amino acids); glycerol and choline derivatives (obtained from the breakdown of lipids); and tertiary cycling of carbon dioxide and hydrogen. Key microbial taxa and related disease states will be referred to in each case, and knowledge gaps that could contribute to our understanding of overall human wellness will be identified.

Indexed as

FermentationGastrointestinal MicrobiomeHost Microbial InteractionsAlcoholsAnimalsBacteriaDietary CarbohydratesFatty AcidsHealthHumansMiceNutrientsRatsAlcoholsDietary CarbohydratesFatty AcidsNutrientsHuman gut microbiomeHuman healthMacronutrientsMicrobial metabolism

Identifiers

PMID31196177
PMCPMC6567490

What OpenQuestion holds

Textmetadata
LicenceCC BY
Read underepoch 390

Registered trials

None linked

Read under generation 80e0d062 · epoch 390. Bibliography from PubMed, PubMed Central and OpenAlex; grants from NIH RePORTER; trial links from ClinicalTrials.gov; estimates, votes and beliefs from the OpenQuestion graph.