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Microplastics are infiltrating brain tissue, studies show: ‘There’s nowhere left untouched’

Twenty-four brain samples collected in early 2024 measured on average about 0.5% plastic by weight

A growing body of scientific evidence shows that microplastics are accumulating in critical human organs, including the brain, leading researchers to call for more urgent actions to rein in plastic pollution.

Studies have detected tiny shards and specks of plastics in human lungs, placentas, reproductive organs, livers, kidneys, knee and elbow joints, blood vessels and bone marrow.

Given the research findings, “it is now imperative to declare a global emergency” to deal with plastic pollution, said Sedat Gündoğdu, who studies microplastics at Cukurova University in Turkey.

Humans are exposed to microplastics – defined as fragments smaller than 5mm in diameter – and the chemicals used to make plastics from widespread plastic pollution in air, water and even food.

The health hazards of microplastics within the human body are not yet well-known.

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“The researchers found that 24 of the brain samples, which were collected in early 2024, measured on average about 0.5% plastic by weight.” 

Recent studies are just beginning to suggest they could increase the risk of various conditions such as oxidative stress, which can lead to cell damage and inflammation, as well as cardiovascular disease.

Animal studies have also linked microplastics to fertility issues, various cancers, a disrupted endocrine and immune system, and impaired learning and memory.

There are currently no governmental standards for plastic particles in food or water in the United States.

The Environmental Protection Agency is working on crafting guidelines for measuring them, and has been giving out grants since 2018 to develop new ways to quickly detect and quantify them …

An examination of the livers, kidneys and brains of autopsied bodies found that all contained microplastics, but the 91 brain samples contained on average about 10 to 20 times more than the other organs.

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The results came as a shock, according to the study’s lead author Matthew Campen, a toxicologist and professor of pharmaceutical sciences at the University of New Mexico …

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