Concerns Over Chemicals in Seattle Breast Milk Samples

New research has revealed that breast milk from mothers in Seattle contains troubling levels of hormone-disrupting chemicals like BPA, BPS, melamine, cyanuric acid, and triclosan.

These substances are particularly dangerous for infants, as they can disrupt hormones vital for healthy development, and even trace amounts can be harmful. A study found that around 92% of the 50 breast milk samples tested contained at least one of these chemicals.

In addition to these findings, the milk samples were previously shown to have high levels of PFAS “forever chemicals” and flame retardants, which are known endocrine disruptors.

Ryan Babadi, a lead author of the study and senior scientist at Toxic Free Future, expressed concern about the implications of these findings. “This is particularly worrying for infants and children who are in critical developmental stages regulated by the endocrine system,” he noted.

While earlier studies have detected individual chemicals in mothers, this research stands out for identifying melamine alongside various classes of endocrine disruptors in breast milk.

Babadi reiterated that breastfeeding is still the best option for infants when possible, given its nutritional value and overall safety. He pointed out that many of the same chemicals are also present in infant formulas. However, he stressed that these findings reflect a “widespread, systemic problem,” stemming from extensive use of these chemicals by manufacturers and inadequate regulatory responses.

Endocrine disruptors are commonly found in everyday products, with triclosan often included in personal care items, while melamine, BPA, and BPS serve various functions in plastics.

The study indicated that BPA and BPS were present in 74% and 78% of the samples, respectively. Epidemiological studies have linked these chemicals to numerous developmental and reproductive issues, and BPS specifically is associated with lower weights in young children. BPA is connected to neurodevelopmental problems, asthma, and obesity.

Additionally, triclosan was detected in 62% of the samples, and melamine in 92%. Although research on the health effects of exposure to mixtures of these chemicals is limited, existing studies have connected such exposure to lower birth weights.

Despite acknowledging a limitation due to the study’s small sample size, the authors noted that the participants tended to be more educated and higher-income. Some chemicals were found at levels below the World Health Organization’s daily intake recommendations, yet still at concentrations considered potentially harmful.

Efforts like avoiding plastic can help mothers limit exposure to these chemicals, but Babadi cautioned that such actions are often inadequate given how widespread these substances are in consumer products.

This study arrives at a time when the Trump administration is taking steps to roll back chemical regulations, targeting limits on various toxic substances found in consumer goods and water, as well as attempting to weaken the regulatory framework.

Babadi concluded that these results underscore the urgent need for stronger protections, rather than rollbacks. “If policies are weakened,” he asserted, “exposures will only worsen, negatively impacting the health of children, adults, workers, and communities.”