Relax, take a moment. Forget your treatments, just for a short while. I would like to tell you a story. Well, perhaps more of a parable. Everything is complicated.
Conservation is complicated.
So too, toxicology is complicated. Assessing health risks of materials is not a simple matter. Understanding the full mechanism of any interaction between a living organism and an environmental agent is a tricky business. I have recently read an article which can be thought of as a parable addressing the complexity of toxicology. The piece, written by Marguerite Holloway, examines research on dioxin.