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antagonism · 1
Nanoscale plastic particles (smaller than 100 nm) can enter cells and even mitochondria, and in experiments they disturb the energy-producing electron transport chain, raising reactive oxygen species and lowering ATP output; in the body, ATP works bound to magnesium. This is inferred from the mechanism, and the human evidence is still very early.
regulates · 2
Marfella 2024 studied patients having carotid plaque removed: those whose plaque contained micro- and nanoplastics had a clearly higher risk of heart attack, stroke or death during follow-up. This is a modest observational study that has not been replicated and cannot show that the plastic caused it; the mechanism is plausible but still needs testing.
→IBS
This pathway gets mentioned a lot, but the evidence is still early: in cell and animal studies, plastic particles may reduce the tight-junction proteins between gut lining cells, loosening the gut barrier, and shift the makeup of gut bacteria. Its link to irritable bowel syndrome is so far only an association, not established cause and effect.
contrast · 3
Do not give up fish because of microplastics: the omega-3 fats, protein and vitamin D in fish are clear benefits, while the health effects of microplastics are still unclear. To cut exposure, remove the guts of small fish you would eat whole, rather than crossing a whole food group off the list.
Antioxidants target the oxidative stress that particles cause, not the particles themselves. Something like N-acetylcysteine (NAC) might in theory buffer reactive oxygen species, but it has no way at all of clearing plastic from the body; taking it to flush out plastic confuses two different things.
Chlorophyll, chlorella and spirulina products are marketed as binding microplastics, but there is no evidence that they do, and spirulina has its own problem with heavy-metal contamination. To cut exposure, reducing it at the source does more than swallowing a binder.