At the very least, significantly more microplastics were found in corpses of people who had dementia and the volume has increased between 2016 and 2024.

Correlation vs causation will require more research but it surely can’t be harmful begin to reduce exposure where we can as we didn’t have microplastics resident in our body for most of human history. I’d hazard an educated guess that accumulating any inorganic material inside your body isn’t good for you.