Where can I find proof unnatural additives effect people's health?

if anyone knows where I can find how chemically induced hormones, sugars and any other items unnatural addatives that are put into most foods?

The information is slowly making its way to doctors and the public but the whole thing is that processed foods cause most illness.

One proof is that certain colorants that we use here are illegal in Australia.
Another proof is that starving nations won't accept our food.
Japan only imports one of our meat sources.
Other countries' govts do not accept our food products based on health concerns and many formulas have to be changed to be deemed safe.
An example of this is the Danon Yogurt in Mexico is a higher quality yogurt than what we eat here.

there is a book on all of that, if you are willing to go that far, iv personally read it, and it scared the living sh*t out of me when i read how much harm all these food we eat can give you.
i also think there is a website for this book, but i dont know it.
the books name is
natural cures "they" dont want you to know about
the guy who wrote the book was threatened by the government if he sold the book, he talks all about it, its amazing

Proof is hard to come by, and when it's there, the FDA generally steps in. People have tons of worries, and perhaps some of them are valid, but scientific proof is very complicated, even for the experts, and if you're asking on this venue, you aren't likely to be one of them. The way to do this is to get your doctorate in an appropriate discipline and do the research.