A new peer-reviewed study has detected hormone-disrupting chemicals in breast milk samples from mothers in Seattle, raising concerns about potential health risks to infants.

Researchers analyzed 50 breast milk samples and found that approximately 92% contained at least one of several chemicals they tested for, including BPA, BPS, melamine, cyanuric acid, and triclosan. These substances are commonly found in plastics and antimicrobial products.

The chemicals identified in the study are classified as hormone disruptors, which means they can interfere with the body's endocrine system. According to the research, these substances pose particular risks to newborns because they can affect hormones critical to proper infant development.

The study focused specifically on antimicrobials and plasticizers, chemical categories that have been previously linked to health concerns even at low exposure levels. The research adds to existing scientific literature documenting the presence of industrial chemicals in human breast milk.

While breast milk remains the recommended nutrition source for infants according to major health organizations, the findings highlight ongoing concerns about environmental chemical exposure and its potential impact on maternal and infant health.

The Seattle-based study contributes to broader research efforts examining how everyday chemical exposures may affect human health, particularly during vulnerable developmental periods.