People talk that food additives are not healthy. But are really all of them not healthy. Are food additives all substances that have in their short names E and number. If it is so, are food additives also in medicines not only in food, because when I read ingredients of one medicine, I found that there is yellow iron oxide in medicine and also is written E and number. But as I know iron oxide isn't toxic (or it is). As I know is iron oxide toxic for breathing authorities but for other body it isn't. When some food additives are toxic if person eat them too much, what can they potential do against health. Do someone maybe get cancer somewhere in the body?