Having talked to a Doctor friend about this he suggests the only safe way to deal with it is to draw blood, to dispose of it, and let the body recover. He had some concern that some of the plastic was as small as blood cells and platelets so might be too hard to filter out. But I guess research will look at that.
Coming soon: Dialysis health spas. Come and detox from all the microplastics in your blood.
Thats the thing, some of these particles are smaller than our cells. You cant technically filter. Not with current techniques that is