Even if you do eat them, there's no evidence (or I suppose I should say no evidence yet) of microplastics being harmful when ingested. Nanoplastics, on the other hand, have been found to impact animal embryos and cells grown in labs.

A problem with microplastics is that they come bundled with numerous xenoestrogens and other harmful contaminants. This too is what makes them very harmful, especially when conceiving a child.

Citation.

And your statement should read, at most, "some come bundled with....".