They are invisible toxins.
A recent study suggests that microplastics may be contributing to an increase in chronic diseases in coastal and lakeshore communities across the United States. Researchers presented their findings at a meeting of the American College of Cardiology, highlighting a potential link between microplastic pollution and higher rates of conditions such as high blood pressure, diabetes, and stroke. The study also indicated a dose-response relationship, meaning that areas with greater concentrations of microplastics had higher incidences of these health issues.
Microplastics, which are tiny plastic particles as small as one nanometer, originate from the breakdown of larger plastic materials found in food packaging, consumer products, and construction materials. People are exposed to these particles through the water they drink, the food they consume, and the air they breathe. Scientists analyzed data from the U.S. Centers for Disease Control and Prevention (CDC) alongside federal reports on microplastic concentrations in sediment from 555 shoreline census tracts between 2015 and 2019.
The study found that microplastics ranked among the top risk factors for chronic diseases, even when accounting for 154 other socioeconomic and environmental factors, such as income levels, employment rates, and air pollution. Researchers were surprised by how significantly microplastic exposure correlated with disease prevalence, but they cautioned that the study does not establish a direct cause-and-effect relationship. Further research is necessary to confirm the link and identify any additional contributing factors.
Experts emphasize the need for more studies to determine how much microplastic exposure could impact human health. In the meantime, individuals can take steps to reduce their exposure by minimizing plastic waste. Researchers also stress the broader importance of environmental health, noting that protecting the planet ultimately benefits human well-being.
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