I am doing a paper on how nutrition and the demonization of food.?

You have my sympathy: You're being asked to take time in which you could be learning real, marketable skills to write about the politics of how we perceive food choices and obesity. This itself might be worth understanding, but the term "demonization" usually indicates a left-wing and nonscientific political agenda. To be successful, you need to find out the prejudices of your grader.