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← Conditions Mental health Genus-level

Anorexia nervosa

Compared within 2 studies that had both: 153 people with anorexia nervosa and 126 healthy people. 2 genera are less common in people with anorexia nervosa, and 8 more common.

A difference is an association: it doesn’t mean these genera cause, prevent or treat anorexia nervosa. GMrepo reports this group at the genus level only, so these are genera, not species.

Phylum

Searching opens both lists and shows only matching rows.

Less common in anorexia nervosa · 2

Strongest first, then the biggest gap · Each figure is 10 people Strongest first · Each figure is 10 people
  1. Howardella genus in 2 studies Healthy 21% anorexia nervosa 6.5%
  2. Agathobacter genus in 2 studies Healthy 86% anorexia nervosa 71%

More common in anorexia nervosa · 8

Strongest first, then the biggest gap · Each figure is 10 people Strongest first · Each figure is 10 people
  1. Hydrogenoanaerobacterium genus in 2 studies Healthy 4.3% anorexia nervosa 24%
  2. Hungatella genus in 2 studies Healthy 11% anorexia nervosa 29%
  3. Eisenbergiella genus in 2 studies Healthy 18% anorexia nervosa 39%
  4. Caproiciproducens genus in 2 studies Healthy 3.7% anorexia nervosa 16%
  5. Coprobacillus genus in 2 studies Healthy 1.6% anorexia nervosa 11%

As many carry these · 4 the amount differs

Strongest first, then the biggest gap · Each figure is 10 people Strongest first · Each figure is 10 people
  1. Alistipes genus in 2 studies Healthy 93% anorexia nervosa 95%

    Carriers have more, in 2 of 2 studies (2.8% → 4.2% of their gut microbes).

  2. Lachnoclostridium genus in 2 studies Healthy 86% anorexia nervosa 77%

    Carriers have less, in 2 of 2 studies (0.21% → 0.16% of their gut microbes).

  3. Faecalibacterium genus in 2 studies Healthy 99% anorexia nervosa 97%

    Carriers have less, in 2 of 2 studies (5.1% → 4.2% of their gut microbes).

Where these numbers come from

Studies
Only GMrepo projects that had people with the condition and healthy people, 10 or more of each. Numbers come from those studies, never from pooling.Sampled in the Czech Republic, Germany.
How common
The share of people whose sample has any of it, in the people with the condition and in the healthy people of those same studies. Tested within studies (Cochran–Mantel–Haenszel, corrected for testing many microbes); a difference counts when it is clear and meaningful (Cohen’s h of 0.2 or more).
Strength word
Counted by code from how many studies point the same way: Seen again and again (3 or more, none clearly the other way), Seen more than once (2, the majority), Seen once (1, listed last). Where studies disagree, a row isn’t listed.
Each study
Tap a row for every study’s own numbers, and for how much carriers have.
Analysis
Our analysis of GMrepo data. GMrepo on Data sources · Read the rules

Also compared · 114 genera

Compared within studies that had both, but not listed above.

Studies disagree · 2

No meaningful difference · 112
PubMed · human studies and reviews first

Recent research

All research on it
  1. Journal of psychosomatic research · 2025
    Beyond the surface: gut microbiome and implicit learning in anorexia nervosa - A pilot study.
    PubMed ↗
  2. Journal of affective disorders · 2024
    Causal effects of gut microbiota, metabolites, immune cells, liposomes, and inflammatory proteins on anorexia nervosa: A mediation joint multi-omics Mendelian randomization analysis.
    PubMed ↗
  3. Endocrinology · 2019
    The Gut Microbiome Derived From Anorexia Nervosa Patients Impairs Weight Gain and Behavioral Performance in Female Mice.
    PubMed ↗
  4. Observational PloS one · 2017
    Microbiota in anorexia nervosa: The triangle between bacterial species, metabolites and psychological tests.
    PubMed ↗

Source: PubMed, U.S. National Library of Medicine · 4 linked papers, last 10 years