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Babies exposed to microplastics and hormone-disrupting chemicals through formula, plastic bottles, infant feeding supplies · U.S. Right to Know articles

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  Babies exposed to microplastics and hormone-disrupting chemicals through formula, plastic bottles, infant
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  feeding supplies. Key findings.
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  One study estimated that polypropylene baby bottles can release up to 16.2
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  million microplastic particles per liter of formula during conventional formula preparation. Studies
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  detected microplastics and chemicals, including phthalates and bisphenols, in formula, packaging, and
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  other feeding products. Some studies reported changes in gut bacteria, immune related
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  markers, and hormone function, but the review could not establish whether exposure
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  causes harm. Babies may consume millions of microplastics and traces of harmful
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  chemicals through infant formula, plastic bottles, and other feeding products, according to
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  a scientific review. The review, published in September in Environmental Science and
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  Pollution Research, examined 27 studies of these products published over They past
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  decade. They show evidence of tiny plastic particles and endocrine disrupting chemicals,
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  EDCs, including phthalates, bisphenols, perfluoroalkyl substances, PFS or forever
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  chemicals, and organophosphorus flame retardants
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  Overall, the findings highlight an emerging problem with profound implications for public
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  health, the authors say.
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  This review highlights the daily, unnoticed, and poorly regulated exposure to various
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  chemical agents that occurs today, they wrote. The discovery of plastic particles
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  in infant formula and baby bottles, even before their first use, raises
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  ethical questions about the safety of products intended for this population."
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  The amounts may be tiny by weight, but these exposures may cause
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  long-term health harms. Frequent formula consumption, especially where breastfeeding is limited, adds
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  to worries about exposure. Microplastics, MPs, or particles smaller than 5 mm,
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  can produce highly reactive, oxygen-containing molecules that can damage cells
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  also damage the intestinal lining or gut bacteria, studies show.
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  Meanwhile, EDCs can interfere with hormonal signaling and the body's energy regulation,
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  the authors say. Chemicals such as phthalates, bisphenol A BPA)
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  have been linked to adverse birth outcomes
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  obesity, and reproductive health problems. Recent evidence, for example, suggests that early
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  PFAS exposure
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  may be transferred to the next generation.
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  How babies
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  may be exposed to contaminants
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  Infants face unique risks from exposure to these compounds because their bodies
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  are still developing and cannot process and eliminate most contaminants as efficiently
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  as adults. Their nervous and hormonal systems are also more sensitive to
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  disruptions in metabolism and hormone regulation. The review describes two main routes
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  of exposure: plastic particles
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  and chemicals that migrate from food contact materials into commercial formula. One
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  study estimated that polypropylene baby bottles can release 1.3 million to 16.2
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  million microplastic particles per liter 33.8 ounces during conventional formula
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  preparation. A 4-ounce bottle could contain nearly 2 million particles, the review
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  shows. The review also found plastic particles in commercially available powdered formulas
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  and chemicals in formula packaging and solid or semi-solid foods. Reported substances
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  included phthalates such as D. Ethylhexal, phthalate DEHP)
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  organophosphate flame retardants and their byproducts.
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  Exposure may begin before birth. The review identified studies that detected plastic
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  particles or related substances in the placenta, breast milk
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  samples, suggesting that infants may encounter contaminants beyond formula and bottles. Human
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  milk remains the recommended nutrition for infants.
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  Another study published this month adds to concerns that microplastics can enter
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  drinking water intended for infants and young children. Researchers consistently detected polypropylene
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  particles measuring 20–50 micrometers in water from plastic sippy cups, water bottles
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  with straws designed for toddlers. They estimated that children aged 3 to
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  6 could ingest 1.2 nanograms of polypropylene per kilogram of body weight
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  daily by taking 100 sips from a reusable polypropylen bottle. Prolonged use,
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  sucking, and biting the straw may contribute to particle release. Plastic chemicals
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  may harm infant gut health and immunity. Some studies cited in the
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  September review reported associations between exposure to plastic-related chemicals and changes in
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  the body that can affect an infant's health or development. One, for
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  instance, found lower gut bacterial diversity. These bacteria help train the immune
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  system, protect against harmful microbes, and support digestion. Another study linked plastic
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  baby bottle used to changes in intestinal vitamins and minerals and short-chain
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  fatty acids. These compounds help maintain gut health, support the immune system,
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  and regulate inflammation. Animal experiments also reported possible long term effects. In
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  one study, researchers found changes in hormone levels and ovarian dysfunction. They
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  also reported reproductive effects across generations in mouse pups exposed to microplastics.
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  Other animal studies suggested that microplastics could interfere with digestion and absorption
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  of essential milk proteins. These proteins help provide nutrients for growth and
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  development. Findings from animal models reinforce the biological plausibility of potential
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  long-term health effects. However, their applicability to human populations remains uncertain, the
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  authors wrote. Calls for better monitoring, regulation of infant feeding supplies,
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  the review has important limitations. The researchers say they did not assess
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  the quality of the 27 studies. Differences in testing methods and sample
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  sizes made findings difficult to compare. Most of the evidence came from
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  observational studies, laboratory experiments, or animal studies. Still to be determined is
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  how much of these contaminants infants absorb, how their bodies respond, and
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  whether there are lasting health effects of exposure, the authors caution. Finding
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  contaminants in infant products does not prove that they cause illness. In
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  addition, no internationally accepted limits exist for microplastics in food, and rules
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  for chemical additives vary by region. Earlier this year, the FDA said
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  infant formula remains safe after reporting results from its largest ever testing
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  of infant formula for contaminants, including heavy metals, pesticides, phthalates, and PFAS.
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  The test did not cover microplastics. The authors recommend Better monitoring of
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  microplastics and hormone-disrupting chemicals in infant formula, packaging
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  and feeding products, consistent testing methods, more research into early childhood exposure,
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  safer packaging. Stricter limits on chemicals that move from packaging into food.
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  Protecting the developing population means anticipating and controlling these factors that could
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  threaten health, the authors wrote. Although we have only partial evidence, it
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  is sufficient to justify responses from regulatory, public health, and research agencies,
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  making it necessary to establish an autoxicological surveillance system that takes concrete
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  action to address this issue. Reference Amaya MC, Bolaños Rodriguez SD, Burgos
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  J.S. Hernandez Rincon EH Microplastic, and Endocrine Disruptor Contamination in Infant Formula
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  and Early Health Effects. Scoping review. Inviron Psi Pulut Res 2026-33, 1528515297,
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  DOI 10.1007-S 11356-026-381535.