Earlier quoted context omitted.
They are made in a lab and not from an actual fruit or plant?
well considering there's a million different plants or fruits that will kill you quite easily, im not exactly sure that is something worth caring about.
Not so with lab created stuff - your body may not have the ability to do anything with it, so it either sits and causes slow damage, or gets excreted very slowly, and can cause hard to detect damage.
For example acetone is not very toxic because the body can metabolize it.