Reducing personal exposure seems possible. I mean, realistically there are only so many ways microplastics can enter the body, so it's a matter of managing your "attack surface".
Of course there's no way to know what the impact really is, but what we've done in our household in the past few years:
- Eating/drinking: started using glass food containers, ceramic cookware, silicon kitchen utensils. Got a good reverse osmosis water filter, stopped buying bottled water.
- Skin: lots of fabrics are derived from plastics these days, so try to get 100% cotton. Do research on skin products you use every day.
- Air: get a good air purifier and run it throughout the day. Even if the windows are closed, furniture can off-gas microplastics into the air. HEPA air filters for your car, pretty easy to install yourself.