When a CBS News medical correspondent claimed this week that we’re accumulating a plastic spoon’s worth of plastic in our brains, her colleagues looked horrified, and for good reason.

A recent study has found microplastics are accumulating in the human brain, with potential connections to diseases such as Alzheimer's, Parkinson's and ALS.

Every month, it seems, a new paper comes out declaring that microplastics have invaded another realm of our body: They’re in ...