microplastics from plastic pepper grinders? I have a regular (steel) pepper grinder but I have defaulted to buying and using the 'all-in-one" bottles of peppercorn with the grinder top' from Trader Joe's.

I am hearing more and more about exposure to 'microplastics' from all sorts of sources. Last night while I was cooking and grinding some pepper into a roue for a cauliflower-cheddar casserole (it was delicious!), it occurred to me: am I adding microplastics along with the pepper? 

I'm no engineer or physicist, but it seems likely that a plastic grinder working against hard peppercorns is going to cause wear on the grinder surface with the result getting added to food.

Is this a known "thing" (e.g. concern, myth, stoner speculation )? I've googled around but couldn't find anything.
If you go small enough, you're always inhaling/ingesting something foreign.

Your concern, although logically valid, is nearly impossible to regulate or even measure. We're talking about amount that is, literally, microscopic.

You're definitely eating it, but discussion of the consequences (if any) is off topic on the site. 

The environmental concerns are valid, because even though they're small, they do not decompose and collects.