Mother-Daughter study tests if cleaning up your home can cut breast cancer risk

NCT ID NCT04265547

Completed Knowledge-focused Sponsor: Columbia University Source: ClinicalTrials.gov ↗

First seen Jun 26, 2026 · Last updated Jun 26, 2026

Summary

This study looked at whether mother-daughter pairs who change their household habits—like using chemical-free products and better cleaning—can lower their exposure to harmful chemicals and alter breast tissue composition. The goal was to see if these changes could reduce breast cancer risk. The trial involved 32 participants and measured chemical levels in urine and breast tissue using a special light-based machine.

What this could mean

Our plain-language read of the trial. This is informational only — not medical advice or a prediction.

Active substance: behavioral intervention (household cleaning and product changes)
What this could lead to: If successful, this could show that simple household changes reduce exposure to chemicals linked to breast cancer risk, pointing toward prevention strategies.
What could go wrong: This is a very small, early feasibility study with only 32 participants. It measures short-term changes in tissue and urine, not actual cancer outcomes, so results may not lead to clear health recommendations.

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Conditions

The condition(s) this trial relates to.

breast neoplasm

As listed by the trial registrant

The condition terms exactly as the trial's registrant entered them.

BREAST CANCER RISK

Contacts and locations

Locations

Columbia University Mailman School of Public Health

New York, New York, 10032, United States

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