# How Chronic Stress Ages Your Blood Stem Cells Through the Gut

*Psychological stress drives aging-like hematopoietic stem cell dysfunction through a brain-gut-bone marrow axis.*

- **Evidence Level**: Preliminary
- **Publication Types**: Journal Article
- **Journal**: Cell stem cell
- **Sample Size**: Mice (number not specified)
- **Authors**: Tian X, Wu B, Yang K, Wang Y, Li Y, Guan J, Wang K, Zhao Y, Sun K, Ling Y, Zheng J, Xie M, Liu W, Ye X, Li C, Jiang L, Zhao M
- **Published**: 2026-07-02
- **Topics**: stress, gut microbiome, stem cells, spermidine
- **DOI**: https://doi.org/10.1016/j.stem.2026.05.012
- **Original Source**: https://pubmed.ncbi.nlm.nih.gov/42392052/

## Summary

In mice, ongoing psychological stress made blood-forming stem cells act older and worn out. The stress worked through a brain-gut connection, cutting levels of a helpful gut bacteria and a compound called spermidine. Restoring those levels helped protect the stem cells. This links stress, gut health, and aging in a surprising chain.

## Practical Takeaway

This early animal work hints that managing chronic stress may help protect blood-forming stem cells.

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