It's forever getting harder to avoid the bad shit.

GMO? How can you tell?

Fluoride? It gets into just about everything because it is the most reactive element with its highly negative charge.

Ditto radioactive particles. Radioactive particles are chemically attracted to all sorts of things because of their highly positive charge.

Unless you are capable of dna analysis of what you eat or have a spectrum analyzer to determine the elemental/isotopic content of your food, you can be vigilant, which is certainly in order, but you can't possibly avoid all toxins and poisons. You just can't...