I haven’t fact checked this, but I sure hope it isn’t true:
Well, by reading the linked article, it is true I would say: Bioaccumulation of microplastics in decedent human brains | Nature Medicine But I think there isn’t a correlation between sold FDM printers and microplastic concentration in the human body 
But who wonders, plastic is everywhere
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It’s a thing. A very serious thing. I’ve seen it firsthand, the following is my short writeup I use for comments on articles to hopefully educate and garner more attention to the terrible future coming for everyone’s kids. I wish I would have been on better terms with my father as I would bet I would have seen the degradation of the sponge and maybe could have saved his mind if not a little more time with him on this Earth. This is my father’s lament…
Some of what we’re seeing now isn’t neurological. It’s primarily mechanical, secondarily cascading/chemical toxicity from microplastics. This includes polyester and polyurethane, as I’ve seen firsthand what an accelerated dosing (PE/PU) does to the human body as I witnessed my father’s decline from using a Philips CPAP over 8 years which had a PE/PU piece of foam that degraded and was inhaled. He went from absolutely fine to staring off, unresponsive, upright vegetable. Next time you’re at the store, look at how 95% of clothes are now polyester. Every time you wash them microfibers are born, then you inhale at some point… My dad never even received the tau protein tests, though healthy individuals have been found with elevated tau proteins as well. He got put on anti-alzheimer meds with zero tests. Get rid of your polyester, non-cotton clothing. Mark my words. Remember, it’s called PRACTICING medicine.
It’s only until it’s paid attention to do most humans consider it important. Every time you “smell filament” printing, it’s you, inhaling particulates.
Even despite this, uneducated individuals will scream “there’s no proof”.
Microplastics are everywhere, in our food, our water, our ground, our bodies - and brains.
The first related study I found came out in 2012.
Many plastics won’t degrade as advertised - take those cheap shopping bags and poly ropes.
The degrade and keep breaking down into smaller pieces but those pieces won’t disappear, won’t be eaten by microbes or such.
Already in the mid 1990’s scientist, eco freaks and other people tried to highlight the problem by showing samples from landfill areas, crop fields and home gardens.
But no one listened, no one care, today still no one who should seems to care, especially not the producers of those plastics.
The problems with those plastics are still not fully explained as we keep finding more issues the more we check.
Like how certain microplastics affect human hormone levels, bind with proteins or release chemicals when attacked by our immune system or drugs.
Worse for our environment because here we checked more things.
Microplastics found there way into plants and all sorts of tiny critters - they are the food for bigger critters and at the end we often find the human…
They all accumulate those plastics and every critter eating them gets their dose added.
No, no all of them are added, some leave through the digestive tract but still.
If you are concerned about microplastics you should also check on the PFOS problem and while at it wonder why our heavy metal exposure has gone up instead of done.
After that you will have found enough links in relation to our drinking water to check why we use Chloramines and Fluorides in our water supplies - Chloramines are really bad for you and there are not many fluoride compounds not to be considered nerve toxins…
Just saying as the info was and still is out there but people are too distracted these days to check and wonder…
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They only recently developed a dependable way to separate the plastics from aqueous solutions and biomatter iirc. Unless he died within the last 6 months or so?