Microplastics have been found almost everywhere: in blood, placentas, lungs – even the human brain. One study estimated our cerebral organs alone may contain 5g of the stuff, or roughly a teaspoon. If true, plastic isn’t just wrapped around our food or woven into our clothes: it is lodged deep inside us.

Microplastics are shed from packaging, clothes, paints, cosmetics, car tyres and other items. Some are tiny enough to slip through the linings of our lungs and guts into our blood and internal organs – even into our cells. What happens next is still largely unknown.

"Designing a definitive experiment is hard, because we’re constantly being exposed to these particles,” says Dr Jaime Ross, a neuroscientist at the University of Rhode Island in the US. “But we know microplastics are in almost every tissue that has been looked at, and recent studies suggest we’re accumulating far more plastic now than 20 years ago.”

  • Jerb322@lemmy.world
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    8 hours ago

    Future humans, or probably aliens, will use the plastic’s make up to determine how old we are. Like carbon dating. Or isotopes.

  • Etterra@discuss.online
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    10 hours ago

    Conservative weirdos out there going nuts about vaccines and 5G, and meanwhile all that Vitamin P they’ve got in their brains is like “lol now hallucinate deficit spending on turning feral hogs gay.”

  • shalafi@lemmy.world
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    13 hours ago

    None of these articles address how microplastics could be harmful. Everyone just assumes they’re bad. For example, what cellular machinery is being damaged?

    • 🍉 Albert 🍉@lemmy.world
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      6 hours ago

      as a cell biologist this confuses me.

      usually we find the symptoms and discover the cause afterwards.

      however, with micro plastics, we discovered the “cause” but somehow, haven’t really found any symptoms.

      I’m assuming that having then is bad, yet it’s surprisingly inert.

      I’m sure in 10 years we will find a massive horror that they cause when it’s too late.

    • Lumisal@lemmy.world
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      11 hours ago

      Because it’s ultimately a Pascal’s Wager due to it being unknown.

      You can assume they’re not bad and go all in on plastics. But if you’re wrong, you’ll pay for it worse than if you probably tried avoiding further intake as much as possible.

      • T156@lemmy.world
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        9 hours ago

        At the very least, we know that they’re chemically inert, but the current school of thought is that they might cause trouble as a result of that, by physically obstructing things, even if they don’t otherwise cause problems.

        • piecat@lemmy.world
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          8 hours ago

          Asbestos is chemically inert, as are PFAS, but both are understood to be pretty bad for you

  • dan1101@lemmy.world
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    16 hours ago

    Between microplastics, COVID, and loosening of environmental laws things are looking rough

  • Fyrnyx@kbin.melroy.org
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    21 hours ago

    This is how the human extinction will happen and it won’t be epic.

    It’ll be because of plastic.

    • 🍉 Albert 🍉@lemmy.world
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      6 hours ago

      imagine future paleontologists a million years from now, being supercondused by the sedimentary layer full of WTF shit. why are all the fossils from that era contain strange polymers found nowhere in nature followed by a mass extinction.

      • Zink@programming.dev
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        6 hours ago

        I hope they write stories about how a mysterious giant asteroid made of strange synthesized polymers must have smashed our planet. It was probably a devastating mass driver attack by a technologically superior enemy capable of alchemy.

        • 🍉 Albert 🍉@lemmy.world
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          5 hours ago

          they would look for asteroids with similar polymers, and spend way too much time studying carboniferous asteroids.

          i find that concept fascinating. because it’s “it’s never aliens” except this time it practically is but also unprovable.

          I’m a few million years, i doubt there’s even human traces on the moon. although I imagine them finding some human dead satellite in geostationary orbit would blow their fucking minds

    • Aneb@lemmy.world
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      7 hours ago

      Can we think positive pls. What if our cells learn to process plastics and we slowly mechanically become immortal instead of carbon lifeforms we evolve into living silicon.

    • SaveTheTuaHawk@lemmy.ca
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      20 hours ago

      No, it will be because internet education will cause people to ignore actually preventative medicine like Pasteurization, hygiene, and vaccines.

    • Random_Character_A@lemmy.world
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      19 hours ago

      Probably no extinction, but our current way of living will come to an end.

      Since microplastics disrupts small blood vessels in the brain it probably causes cognitive decline.

      Idiocracy?

    • village604@adultswim.fan
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      20 hours ago

      Yup. Climate change will get us close, but this will push us over the edge. Can’t survive a genetic bottleneck if you can’t make babies.

  • Zahille7@lemmy.world
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    16 hours ago

    I just started watching Crimes Of The Future by David Fincher. It’s about human evolution and how we as a species are adapting to the world we’re making.

    spoiler

    SPOILER: there’s a secret subset of people who are in hiding because they eat plastic, and the governments of the world want to suppress them because they’re the next stage of human evolution

  • SaveTheTuaHawk@lemmy.ca
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    20 hours ago

    US loves to generate alarmist second rate science. Humans evolved breathing and eating all kinds of foreign dust, plant fibers, etc. This is why we have mucous linings and a lymphatic system.

    No one has a mechanism for plastics toxicity (we have been making plastic implants for over 60 years). The best we get is people jamming stupid amounts into a poor mouse model for a disease. Plastic polymers are inert.

    This is just another version of the BPA scare that again was never a threat and just people doing bad science in rodents.

    • NewNewAugustEast@lemmy.zip
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      8 hours ago

      Higher exposure to these microplastics, which can be inadvertently consumed or inhaled, is associated with a heightened prevalence of chronic noncommunicable diseases, according to new research being presented at the American College of Cardiology’s Annual Scientific Session (ACC.25).

        • GreyEyedGhost@lemmy.ca
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          13 hours ago

          But it’s always concerning when foreign material crosses the blood-brain barrier. It may not be a problem, but as far as I’ve seen, it wasn’t even a consideration a decade ago.

          • FishFace@lemmy.world
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            12 hours ago

            I’m concerned but I’m not gonna claim that people “can’t do science” if they express optimism/skepticism.

            • whiwake@lemmy.cafe
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              10 hours ago

              You don’t need to. Suggesting so doesn’t make me wrong. I also don’t value your existence, so… you’re welcome to your thoughts. Peace and love 💋

    • shalafi@lemmy.world
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      13 hours ago

      Largely agreed. We’ve been cranking out plastics for a long time now. Shouldn’t we have noted effects by now? Everyone assumes microplastics are bad for us, but I haven’t read any possible mechanisms for damage.

      Whenever I read something even slightly questionable I think, “How would that work?” Not seeing the mechanism(s). Anyone simply assumes this is bad. But tell me how these particles affect us, or how they could affect us. I’ll hear about any educated guesses.