Low Toxicity Food Additives?

I have been doing Toxic Trespass radio for many years, focused on how toxins become cancer and other maladies. Cancer has just gotten too prevalent in our relatively pristine rural environment. In fact many of these cancers have begun appearing in places they had not in the past. For example, brain cancer at one time an occupational cancer is appearing in children. It took my father, a chemical engineer at a young age. He worked around refining plants. I recognize that one toxin does not fully create the problems, but the mix and synergistic combination does.