# Oral Bacterium Linked to Slower Aging Extends Lifespan in Worms

_Evidence Level: Preliminary · Chen J et al., Nature aging, DOI 10.1038/s43587-026-01220-0_

*Multi-modality profiling identifies Neisseria flavescens as a central geroprotective oral commensal in humans.*

- **Evidence Level**: Preliminary
- **Why this grade**: AI modeling plus experiments in worms and aged mice, with human data limited to computer-based associations and no clinical testing.
- **Facts**: Funding: NSFC; China Ministry of Science and Technology; Beijing NSF; China…
- **Population**: Animal study
- **Publication Types**: Journal Article
- **Journal**: Nature aging
- **Sample Size**: Worms (C. elegans) and aged mice; human data from computer modeling
- **Authors**: Chen J, Ren Y, Zhou Y, Wang Z, Li J, Guo X, Xu H, Wang Y, Tang H, Han JJ
- **Graded and published**: 2026-09-24
- **Last edited**: 2026-09-28
- **Topics**: Microbiome, Aging Biology
- **DOI**: https://doi.org/10.1038/s43587-026-01220-0
- **Free full text**: https://pmc.ncbi.nlm.nih.gov/articles/PMC3836174/
- **Original Source**: https://pubmed.ncbi.nlm.nih.gov/42786310/

## Summary

A common mouth bacterium, Neisseria flavescens, was flagged by AI-built aging clocks as linked to slower aging in humans. In worms it stretched lifespan, and in old mice a heat-killed version nudged blood chemistry, liver genes and gut bacteria toward a younger state. Oral health is often seen as just a teeth issue, but this hints mouth bacteria may play a role in whole-body aging. The human link came from computer modeling, and no one has tested this bacterium in people yet.

## Practical Takeaway

This study suggests the oral microbiome may be a promising target for aging research.

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_Canonical: https://longevity-germany.com/en/research/oral-bacterium-linked-to-slower-aging-extends-lifespan-in-worms · Part of Longevity Cities · Updated 2026-09-28_