I just pulled this out from my ass, but I would guess yes, they do. But you rinse your mouth after brushing your teeth so I would guess it's not that bad? Since you're (mostly) not ingesting the microplastic particles from the toothbrush. But again I'm going off of nothing.

[–] iheartneopets@lemm.ee 14 points 4 days ago (7 children)

Current advice is actually to not rinse after brushing, as you're meant to let the fluoride of the toothpaste sit against your teeth for thirty minutes.

Unfortunately, I would recommend not losing sleep over either source of microplastics (chewing gum or toothbrushes), until tires and synthetic clothing are done away with by society. Those are much MUCH bigger, inescapable sources of microplastics

[–] CitizenKong@lemmy.world 9 points 4 days ago (3 children)

Isn't it mostly tires? Which is just another reason humanity has to be cured of this insane car-craziness.

[–] BeMoreCareful@lemmy.world 3 points 4 days ago (1 children)

I think micro plastics are in all the water everywhere.

[–] iheartneopets@lemm.ee 3 points 4 days ago* (last edited 3 days ago)

We're talking about their major sources, not where they're now consequently found

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