No, because you eat and drink more microplastics to replenish yourself.

I was thinking that a kidney dialysis machine might be able to filter out that stuff from your blood. I think the way those work is your blood goes out a tube into the machine and it filters it before sending it back to you. So you'd need filters in there that are fine enough to catch the microplastics.

Probably not. Unless they build up in the body somewhere, the amount of microplastics in your blood is determined by how many you consume via inhaled dust, food, and drink compared with how many you flush put via urine and/or fecal material.

If they do build up in the body somewhere, it probably isn't the blood, because blood is already filtered regularly.

I've read that's true for PFAS... It depends on where the microplastics are stored by your body