What should be done about outrageously unhealthy food?

Have you ever read the book "Skinny *****"? Besides the title it's actually talks a lot about that. About what's really in our food. When I read it I was horrified. I actually think the government is in on putting this unhealthy crap in our food. Why? Because of the money. It's cheaper. Think about it. If they put additives in the food that people love, and these additives can trigger asthma attacks or diabetes, then not only are the food industries making money but also the people that sell the medicine. I think before people can do anything we first must learn the TRUTH!! and not the crap they put on the mainstream news networks. Once we find out the truth it is our job as a democratic nation to change it.