Not going to pretend I have looked into this whatsoever, but just consider the forces you are evaluating here. Planetary magnetism and solar ionization. You are a critter on a planet that came from other critters that came from other critters that came from a crit (single cell joke) and all those things were all subjected to these forces for hundreds of millions of years. Planet itself going on 5 billion years. Aside from that pesky moon slamming into us, and that one time all the blizzards (bird lizards) got annihilated, pretty okay place in the universe to be alive on.

Whatever sources you are diving into are probably not worth your mental effort. Maybe use a bamboo toothbrush and less plastic or something else manageable.