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Science

Industry Executives Knew For Decades That Microplastics Were Infiltrating the Human Body (magzter.com) 109

Susanne Rust of the Los Angeles Times reports (paywalled) that industry executives knew for decades that microplastics were infiltrating the human body. Slashdot reader joshuark shares an excerpt from the report: Scientists today say we're just beginning to understand the harm that the tiny bits of plastic we drink, eat and breathe are doing to the human body. Internal memos among company scientists and executives obtained by The Times reveal that for at least half a century, the plastics industry has been aware of and concerned about the potential for microplastic contamination in the human body. But recently discovered chemical company documents dating back several decades show that industry scientists have long been aware of -- and concerned about -- the way microplastic particles migrate beyond the gut in animals and humans, depositing in important organs. And the potential for that knowledge to affect the plastic food packaging industry.

Their concern goes back to 1974 and a scientific meeting at a New York City hotel, where a German gastroenterologist presented a scientific paper that showed for the first time that ingested particles like microplastics could infiltrate the rest of the body. His presentation was largely overlooked by the government scientists in attendance but became a point of worried discussion among company scientists. Tracey Woodruff, professor of epidemiology and population health at Stanford University, who reviewed the documents, said they indicate scientists and executives at major chemical companies have known and remained silent even as microplastics accumulated in tissues. She likened it to other industries that knew about pollutants -- greenhouse gases, asbestos and tobacco -- but did not take action to make them safer.

A spokesperson with the chemical industry's largest trade group took issue with that characterization. "Scientific debate over what the evidence shows is not silence. It is how sound science and effective policy advance," said Craig Davis, senior director of plastics chemistry at the American Chemistry Council. "Our industry is committed to advancing microplastics science by supporting independent research and policies that would do so."

Industry Executives Knew For Decades That Microplastics Were Infiltrating the Human Body

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  • by Arnonyrnous Covvard ( 7286638 ) on Tuesday October 27, 2026 @02:41AM (#66395428)

    They missed that one in the movie and went for mobile phones instead.

  • Color me surprised (Score:5, Insightful)

    by Slashythenkilly ( 7027842 ) on Tuesday October 27, 2026 @02:47AM (#66395430)
    Its almost like companies have no incentive to police themselves due to reducing their profit margin. At best, any polluting company may be slapped with a fine but no criminal charges will ever be placed. Just the cost of doing business after congressional lobbying, endless court delays, followed by a settlement that will barely touch the bottom line. Kodak, PG&E, DOW Chemical, Monsanto....and the list goes on
    • Re: (Score:2, Informative)

      by Anonymous Coward

      Don't complain about congress. We are the ones responsible for overseeing them. We can completely replace the entire House of Representatives every two years. The senate takes longer, but it can be done. Reelecting 90% [opensecrets.org] of them every time is our failure, not theirs. It's actually a reflection of our corruption, always voting for the guy with the most money. We are rating our politicians by how much money they can raise, not their voting record in the legislature. That, and the whole tribal democrat/republica

      • Both major parties are bought and paid for by the same billionaires. We have a one party system with a thin veneer of choice. Good luck voting your way out of this.
    • No, don't you know that under capitalism markets will self regulate to achieve the optimal in... *cough cough* outcome? Buyers can self organize to avoid buying from harmful monopolies and oligopolies and instead choose to just die! And, if buyers are really upset they can just purchase politicians at a higher price than the harmful corporations do.
      • Market participants regulate the markets. You are a market participant. You are also a voter. See where that's going?

        Your cynicism fails a historical test. How did the Sherman Anti-Trust act get passed if you're right? Why did TR bust all those trusts if you're right? What happened to AT&T?

        • by tragedy ( 27079 )

          What happened to AT&T?

          Well, after it was broken up into "baby Bells", the parts mostly merged back together. Sure, the part that originally kept the AT&T name was technically absorbed by one of the other parts, but the result was more or less the same. A couple of bits formed Verizon. The original shareholders ultimately profited unless they sold at just the wrong time. The rise of cellular service completely altered the landscape and allowed a new round of corporate control. The situation of people in the US having to rent

    • Though I'm not sure heavier fines or criminal charges is really going to fix this, it's too easy for executives to rationalize away any risks.

      The real fix is more funding for researchers (university and government) so they have the resources to investigate these things on their own. We shouldn't have to rely on companies policing themselves.

  • Harm (Score:3, Informative)

    by reanjr ( 588767 ) on Tuesday October 27, 2026 @02:59AM (#66395446) Homepage

    Even today with the media frenzy over micro plastics and everyone worrying over them, the evidence linking them to harm is still pretty limited.

    This is nothing like other industries where there was a clear harm known to exist. This is an unexpected impact that - to this day - we are unsure of in its impact to health.

    The entire selling point of plastics is essentially that they are not very biologically active. Their mere presence is not evidence of harm or even danger.

    • I do have to say it does bother me that the modus operandi these daus is just "we'll spread microplastics all over the earth, and see how bad it is in a few decades"...

      • by dryeo ( 100693 )

        Same thing was done with lead. Along with a healthy put down of the chemical warfare specialists (the only government scientists studying it at the time) who said it was a bad idea with the argument that if it was that bad, they would have used it during the Great War.

    • that are the problem - its the other chemicals that have been added to them that turn out to be biologically significant - plasticisers for example.

    • Re:Harm (Score:5, Insightful)

      by AmiMoJo ( 196126 ) on Tuesday October 27, 2026 @04:33AM (#66395490) Homepage Journal

      "Let's wait until there is undeniable evidence that it is causing massive problems" didn't work so well for climate change, did it?

      Or smoking.

      We should probably just view pollution as bad in general and try to limit it before it becomes a problem.

      • by doc1623 ( 7109263 ) on Tuesday October 27, 2026 @06:32AM (#66395622)

        Agreed. I'm so so tired of the same people that say there is no evidence are the first ones to deny evidence when it exist and refuse to fund it on the logic that we don't have the evidence ... first?

        .

        Unfortunately, we don't police our food (or anything else), and/or pesticides on it, even after there is lots of evidence. . I guess the logic is that it's fine until we can prove it's a chronic problem we can no longer control it... ???. Then let off executives/industry leaders that have done far more to harm society as a whole than any mass murderer on death row.

        • 1. Exxon/other big oil... climate change has and will continue to kill lots people (hopefully, not the entire human race)
        • 2. Tobacco... well we all know how that turned out
        • 3. Purdue Pharma... opioids ..Oh wait some were 'punished'.. (a little bit) The three executives also received misdemeanor convictions.
        • 4. Boeing... ..

        I really don't want to hear another 'it's just the media'... until ... oh wait... it wasn't just hype and lots of people are dead now. It's okay to say that we don't know effects, but if we don't know wouldn't it be logical to either not introduce it until we know, or curb it until we do .... The burden off proof shouldn't be tons of dead people, before we prioritize people over profits.. When it comes to plastics..these are literally the same people who knew about climate change 30-40 years before we did and kept us in the dark...

        • Re:Harm (Score:4, Informative)

          by doc1623 ( 7109263 ) on Tuesday October 27, 2026 @06:44AM (#66395636)

          Also, I'm not expert but... it seems like there is evidence...

          'Microplastics are a source of extreme concern for health: the presence of these tiny pieces of plastic has been linked to heart attacks, stroke, dementia and brain tumors. But what drives these associations is unclear. Now a study published in Nature offers a tantalizing clue: microplastics interact with water, generating highly reactive molecules. When microplastics come into contact with water, the water near their surface can become chemically active, generating highly reactive species that can modify nearby substances, including biologically important molecules.'

          https://science.slashdot.org/s... [slashdot.org]

          • by Viol8 ( 599362 )

            The problem with that theory is its not limited to plastics. MIcro silicates - ie rock fragments - can do the same thing.

            • ...and? Are you seriously saying we shouldn't address serious threats to health because there's other serious threats to health?

            • The problem with that theory is its not limited to plastics. MIcro silicates - ie rock fragments - can do the same thing.

              That's not a problem for recognizing microplastics as a hazard, because we already recognize silicates as a hazard. Thanks for your support!

            • by jsonn ( 792303 )
              Rock fragments are not polarized molecules, are they? That's one of the properties that makes plastics so nasty.
        • by eepok ( 545733 )

          1. Climate Change: This is decided science. The only reason we're barreling toward climate disaster is the people in political power. We were making progress on this front for decades prior to 2016.

          2. Tobacco: You mean, the science came out and contradicted the lies of tobacco company, there's been a 70% reduction in smoking in adults and an >80% reduction with youth? Vaping is still an issue, but it's significantly less harmful than smoking.

          3. Purdue Pharma: Purdue pharma was officially dissolved in May

          • I think you missed my point(s).

            First trusting an industry or a company is INSANE. Second; so is not holding the people behind them accountable. Companies don't exist, they are only legal levers for the people that control them (huge powerful ones). Why do those people get to inflict more pain and suffering on society than any person on death row. Personally, I'm anti-capital punishment, but if anyone deserves it... it's the people that decided this was private information and it would be okay no matter how

      • This is a reasonably literate and intelligent forum. Or it used to be.

        Can we at LEAST recognize the blatant idiocy involved in presenting as equivalent:

        "some things that have been declared harmless turned out to be harmful"
        and
        "things that are harmless will likely actually be harmful"

        I don't know what retards will buy that* but it is such a very internet-flavored-argument it makes me recoil.

        *that's actually a lie: I know *EXACTLY* what sort of retards will cheerfully gobble such nonsense up and likely chase

      • by eepok ( 545733 )

        Actually, it DID work for climate change and smoking.

        We made absolutely MASSIVE strides in reducing the risk of catastrophic climate change leading up to the early 2000s and then the US GOP started actively fighting against the science. Looking at California alone, they went from a huge amount of smog days per year to them being rare. (https://www.aqmd.gov/home/research/publications/50-years-of-progress)

        And the decided science empowered social change to MASSIVELY reduce the incidence of smoking in America.

    • Re:Harm (Score:4, Insightful)

      by thegarbz ( 1787294 ) on Tuesday October 27, 2026 @04:40AM (#66395496)

      Famously the US health secretary chainsmoked his entire way through a presentation on how cigarettes cause cancer. At the time there was also "limited" evidence of that link and the actual clear link would come later.

      There's a mountain of studies coming out correlating microplastics to various health conditions. There's a mountain of studies coming out directly linking specific plastic exposure to specific health effects, e.g. hydrocarbons are known to be able to leach from plastic to a bloodstream, direct long term exposure to plastic is a known endocrine disruptor, and we know so very VERY little about our brains but have also shown that some microplastics can cross the blood brain barrier, and literally nothing other core nutrients crossing this barrier has ever ended well for the people involved.

      There's really little need to sit around and wait for someone to put 2 and 2 together.

      The entire selling point of plastics is essentially that they are not very biologically active.

      Leaving aside the word "very" doing heavy lifting for any substance for which we are continuously exposed to (reminder, asbestos is not biologically active in the slightest), the components that make up plastics very much are biologically active, and there's more and more evidence that they do not stay in their little contained environment (we didn't ban Bisphenol A from use in plastics which come in contact with food stuff because we thought we're bored and need more regulations).

    • Re:Harm (Score:5, Interesting)

      by Rei ( 128717 ) on Tuesday October 27, 2026 @06:20AM (#66395602) Homepage

      The entire selling point of plastics is essentially that they are not very biologically active.

      Gold, on macroscopic scales, is yellow, inert, melts at 1064C, and is a conductor.
      Gold, on nanoscales, is wine-red, purple, blue, brown, or clear, is a catalyst, melts at ~400C, and behaves like a quantized semiconductor.

      Scale matters greatly when it comes to material properties. And one thing to clear up here: while people commonly talk about "microplastics", for clarity, some scientists divide it up between microplastics and nanoplastics. Microplastics (such as from abrasion, fine fibres, etc) are not harmless (inhalation is similar to other inhaled particle matter, for example - not great for your lungs), but they're not the primary area of concern. Nanoplastics are where the concern is. These come from for example hot liquids in plastic containers close to their glass transition temperatures and the like.

      When a nanoparticle enters a biological fluid, it becomes coated in proteins and lipds on its surface (a "protein corona" [wikipedia.org]). The core particle becomes masked and begins to interact with cells and bypasses cellular defense mechanisms (nanoparticles are often used for drug delivery). Microplastics largely pass through the digestive tract uneffected, but nanoplastics cross straight through the intestinal epithelium, and even the blood-brain barrier and the placental barrier.

      The evidence of harm is no longer "limited"; this is unfortunately not a factual statement, unfortunately. I would recommend reading for just one example Marfella et al., N Engl J Med [nejm.org]. Cartoid plaques of patients were analyzed and studied for microplastics; there were significant accumulations in 58.4% of patients. This in itself is not meaningful, but the consequences were: the patients with microplastics had a massive 4,5x higher risk of heart attack, stroke, or all-cause death. And it appears directly causal: as previous research had suggested that nanoplastics are pro-inflammatory, they studied this, and found that the plastic-positive plaques had dramatically higher inflammatory biomarkers.

      The inflammatory problem is what's called "frustrated phagocytosis". When macrophages encounter persistent non-biodegradable particles, they respond by engulfing them. But their enzymes cannot break down plastics. Like a gull that has consumed plastic-laden food in its diet and dies with a gut full of plastics, it will eventually kill them. Because enzymatic degradation fails, they churn out ever-increasing quantities of reactive oxygen species and pro-inflammatory cytokines (to call for help) until they end up destroying themselves - undergoing apoptosis and spilling these toxins into the surrounding tissue. It drives chronic sterile inflammation.

      A good analogy is asbestos. The entire commercial selling point was that it was a miracle mineral: completely non-combustible, chemically inert, and basically indestructable. The problem is that those properties carry over into the human body as well: macrophages attempt to engulf and destroy asbestos particles, fail, and undergo an oncogenic inflammatory cascade.

      Another example is fine particulate matter. Macroscale carbon is extremely inert. Grind it into PM2.5 particles and inhale that, however, and it's horrible for your lungs, and causes systemic vascular inflammation. A chunk of quartz could not be less harmful to you. Grind it into nanoparticles, breathe enough in, and congrats, you have silicosis.

      Also, you have to understand that plastics are not pure; they're loaded with a whole zoo of additives in significant quantities (often even the catalysts used in their production - plastic catalysts are commonly lost in the process of producing their respective plastics). There's colorants, plasticizers, flame retardants, UV stabilizers, and on and on and on, at percentag

      • by gtall ( 79522 )

        Thank you for that!!

      • Re:Harm (Score:5, Interesting)

        by Rei ( 128717 ) on Tuesday October 27, 2026 @06:35AM (#66395628) Homepage

        Another one of those counterintuitive things (on the algal oil) line for me was creatine. Clearly more athletic power and performance is unambiguously evolutionarily advantagenous - if it were good and safe for us to have more, why wouldn't we just produce more?

        It turns out that the answer is: it's massively costly to us to produce. We can't just produce and attach methyl groups (part of the creatine synthesis pathway) out of thin air. Creatine alone consumes half of our transmethylation flux from SAMe -> SAH -> homocysteine! We have to utilize the essential amino acid methionine (which is low in most plant matter, which makes up the majority of most hunter-gatherer calories). And the process is actively harmful to us. The intermediary SAH inhibits almost all transmethylation enzymes. Homocysteine is toxic (endothelial damage, oxidative stress, protein misfolding, etc). Clearing homocysteine is expensive, SAMe does double duty with epigenetic regulation and as a metabolic sensor, etc. High methionine metabolism is directly linked to accelerated aging, and methionine restriction leads to significant increases in lifespan in animal models.

        Since consumption of dietary creatine downregulates the production of innate creatine and thus its transmethylation requirements, it's arguably outright healthy to consume more dietary creatine.

    • Even today with the media frenzy over micro plastics and everyone worrying over them, the evidence linking them to harm is still pretty limited.

      The difficulty is finding a control group without microplastic contamination. It doesn't exist.

    • The entire selling point of plastics is essentially that they are not very biologically active.

      This is so offensively stupid and wrong that it makes me wonder if you are a paid shill for the plastics industry.

    • by icejai ( 214906 )

      So snort a line of fine plastic powder every morning.

      Being chemically inert doesn't make a particle inherently harmless. The fact that they're inert is precisely why it's practically impossible for any biological process in your body to excrete them from the body, so, they just accumulate in your tissues and arteries, triggering your immune system against an invader they cannot destroy, and this leads to prolonged and endless inflammatory response.

      Chronic inflammation then leads to a whole host of condition

    • by hey! ( 33014 )

      While this is true, being the subject of an experiment to see what happens when you do that is not something most people would choose for themselves. It's not *irrational* to be concerned. Absence of evidence on a largely unexplored question like microplastic infiltration in human bodies is not the moral equivalent of absence of evidence in an extensively studied question like a vaccine-autism link.

    • And we all know that although it's true that babies born to smoking mothers are on average smaller some women might prefer smaller babies.

      Seriously it doesn't take five phds to figure out that having your body full of microplastics isn't a good thing. The only reason the research is preliminary is because they keep cutting funding to science research for exactly this reason.

      It's not that we don't know it's bad to have your balls stuffed with microplastics. It's that we don't know exactly how bad. An
  • It sometimes just takes a little while. Unless the human race leans to not give any power to greedy assholes, the future does not look good at all.

  • This story is a repeat of tobacco industry or oil company playbooks. What you do, when you're paid enough, is cover up and run interference so that profits can continue as long as possible. We should be deeply invested in sustainable energy, but we're not because insanely greedy rich fucks who run oil companies can only be bothered to do what is best for them personally.

    • The oil problem isn't one problem or one industry, it's our entire way of life.

      When you make fuel you get other crap out that's not good for making fuel. We make plastic mostly out of that. So being addicted to oil is being addicted to plastic is being addicted to oil again.

      In order to reduce our oil consumption we also have to reduce our use of plastic. The plastics industry is not interested in that. The oil industry is also not interested in that. Either has immense influence, together they are titan.

      • We're addicted for the simple reason plastic is a very versatile material. Try this, look around your life at all the plastics and ask yourself, what will I replace this with?

        • We're addicted for the simple reason plastic is a very versatile material. Try this, look around your life at all the plastics and ask yourself, what will I replace this with?

          As I look around I see a mixture of things, some things which would be very difficult to replace, and some things which would be very easy to replace, and some things where they would still need some plastic but they could use a lot less. The rest could be made of wood or metal. Mostly I propose using aluminum because it's extremely recyclable.

          • But it's also a lot more expensive. Plastic made the mass production of basically anything both cheap and possible. It raised standards of living across the globe. Things that were rare or expensive when made from wood or metal became cheap and plentiful. (and crappier, but you get what you pay for)

            Replacing it now would not be easy, simple, or cheap.

  • Rule 99: "Trust is the biggest liability of all."

  • There is usually a difference. The headline claims executives, the summary, scientists.
  • 1) the tobacco industry
    2) the petrochemical industry
    3) the auto industry...

  • It's at least notable that the plastics industry documented the possibility that microplastics were accumulating in the human body. But with there being such limited knowledge on what harm they do, if any, just by being there? I don't see why this would have sounded any alarms back as far as 1974?

    Comparing this to cigarette manufacturers is a little disingenuous, IMO. That's an industry that encountered mounting evidence that smoking was doing harm and even killing people, yet they doubled-down, paying off

  • HEMATOGENOUS DISSEMINATION OF INGESTED POLYVINYL CHLORIDE PARTICLES
    Gerhard Volkheimer
    DOI:10.1111/j.1749-6632.1975.tb51092.xCorpus ID: 30938937

    TLDR: PVC particles in micrometer size range are very suitable as models to study persorbability in animals and the hematogenous dissemination of PVC particles.

    Abstract: Persorption of large, hard, insoluble, solid particles in micrometer size range is observed with regularity. It is a normal biological effect on the food passage through the intestine. Persorbabilit

  • God damn americans the need to get richer and richer off the health of people is abhorrent, Being Canadian Im waiting for them to try and cross our border in the name of trump, I have been ready for this for a while. Gl to your american ass i'll see you soon.
  • From the 30's to 60's one got too much lead from rigged gas, and 70's+ microplastics.

  • ... there is no problem.

    Why should we care about our children's health after all...

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