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Bioaccumulation of Microplastics in Decedent Human Brains Assessed by Pyrolysis Gas Chromatography-Mass Spectrometry
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Researchers analyzed autopsy samples and found that human brains contained significantly higher concentrations of microplastics than livers or kidneys, with polyethylene being the dominant type. Strikingly, microplastic levels in brain tissue increased substantially between samples collected in 2016 and 2024, suggesting that human brain exposure to microplastics is rising over time.
Rising global concentrations of environmental micro- and nanoplastics (MNPs) drive concerns for human exposure and health outcomes. Applying pyrolysis gas chromatography-mass spectrometry (Py-GC/MS) methods to isolate and quantify MNPs from human samples, we compared MNP accumulation in kidneys, livers, and brains. Autopsy samples from the Office of the Medical Investigator in Albuquerque, NM, collected in 2016 and in 2024, were digested for Py-GC/MS analysis of 12 polymers. Brains exhibited higher concentrations of MNPs than liver or kidney samples. All organs exhibited significant increases from 2016 to 2024. Polyethylene was the predominant polymer; the relative proportion of polyethylene MNPs was greater in brain samples than in liver or kidney. Transmission electron microscopy verified the nanoscale nature of isolated particles, which largely appeared to be aged, shard-like plastics remnants across a wide range of sizes. Results demonstrate that MNPs are selectively accumulated into the human brain and concentrations are rising over time.
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Bioaccumulation of microplastics in decedent human brains
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Researchers found microplastics in human brain, liver, and kidney tissue samples, with plastic levels significantly higher in samples from 2024 compared to 2016. The brain contained especially high levels of polyethylene, and brains from people with dementia had even more plastic accumulation. These findings suggest that microplastics are building up in human organs over time, raising urgent questions about potential health effects.
Post-mortem evidence of microplastic bioaccumulation in human organs: insights from advanced imaging and spectroscopic analysis
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Researchers examined tissue samples from deceased individuals and found microplastics in the brain, liver, thyroid, kidney, heart, muscle, and lungs, with the thyroid, kidney, and brain showing the highest contamination at up to 40 particles per gram of tissue. Nanoscale plastic particles smaller than 0.02 micrometers were also detected, indicating that the tiniest plastics can cross biological barriers and accumulate deep in human organs.
Author Correction: Bioaccumulation of microplastics in decedent human brains
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This is simply a correction notice, not a new study, the original research found tiny plastic particles (microplastics) accumulating in human brain tissue after death. This update just fixes some duplicated images, mislabeled measurement scales, and unclear data tables from the original paper, but doesn't change the core findings about plastics being found in brain samples. If you're interested in what this means for your health, it's worth checking out the original study rather than this technical correction.
Microplastics detection in freshly harvested human brain tissues of northeast Chinese postmortem donors and their correlation with Alzheimer's disease-related pathological proteins.
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Researchers examined brain tissue from 16 deceased donors in northeast China and found microplastics, including polyethylene, PVC, polystyrene and polypropylene, in all samples. Higher levels of two plastic types were linked to higher amounts of a protein associated with Alzheimer's disease, though this does not prove the plastics caused the protein changes.
Bioaccumulo di microplastiche e nanoplastiche nel cervello umano
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This study examines the growing body of evidence on microplastic and nanoplastic accumulation in the human brain. Researchers note that a 2025 study in Nature Medicine found brain concentrations approximately 10 times higher than in liver and kidneys, with levels doubling over an eight-year period. The evidence indicates a potential correlation between high plastic concentrations in brain tissue and dementia, though more research is needed to establish causation.
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