Gut bacteria and benign breast disease

Identifying the role of the gut microbiome in the etiology of benign breast disease

NIH-funded research Rutgers Biomedical and Health Sciences · NIH-11256731

Researchers compare gut bacteria and their metabolic products in women to see if differences are linked to benign breast disease and hormone-related breast risk.

Quick facts

Grant typeNIH-funded research
Study typeNIH-funded research
Funding institutionRutgers Biomedical and Health Sciences NIH-funded
Lab location1 site (Newark, UNITED STATES)
Project IDNIH-11256731 on NIH RePORTER

What this research studies

You would be represented through data and stool samples from women in the Nurses’ Health Study II, where researchers will compare gut bacterial communities across about 1,800 participants based on hormonal factors. They will then focus on a nested case-control group of roughly 300 women to compare microbiome patterns in those who developed the high-risk, proliferative form of benign breast disease versus those who did not. The team will use 16S rRNA gene sequencing to map bacterial types and will measure microbial metabolites to explore effects on estrogen balance. Together these steps aim to explain whether gut microbes help link hormone-related factors to benign breast changes.

Who could benefit from this research

Good fit: Ideal participants are adult women—especially those enrolled in the Nurses’ Health Study II or willing to provide stool samples and hormone/health histories—whether they have benign breast disease or not.

Not a fit: People currently seeking immediate treatment for active breast cancer or those unable to provide stool samples are unlikely to directly benefit from this observational study.

Why it matters

Potential benefit: If successful, this work could point to gut bacterial markers or metabolic pathways that help predict or prevent benign breast disease.

How similar studies have performed: Previous studies have linked the gut microbiome to estrogen metabolism and breast cancer risk, but systematic work directly focused on benign breast disease is largely novel.

Where this research is happening

Newark, UNITED STATES

Researchers

About this research

  1. This is an active NIH-funded research project — typically early-stage science, not a clinical trial accepting patient enrollment.
  2. Some NIH-funded labs run parallel clinical studies or seek volunteers for related work. To check, contact the principal investigator or institution listed above.
  3. For full project details, budget, and progress reports, visit the official NIH RePORTER page below.
Last reviewed 2026-06-10 by the Find a Trial editorial team. Information on this page is for educational purposes and is not medical advice. Always consult qualified healthcare professionals about clinical trial participation.