I'm assuming that you've read the book Fast Food Nation. Most processed foods have been frozen or otherwise treated in ways that destroys the flavor profiles of the ingredients and thus necessitates the need for synthetic perfumes to simulate the taste of said ingredients.
That being said, wheat gluten (read the books Grain Brain and What's With Wheat), high-fructose corn syrup and vegetable (corn, sunflower and canola) oils seem to be the main drivers of obesity. They put that crap in everything.
I'm assuming that you've read the book Fast Food Nation. Most processed foods have been frozen or otherwise treated in ways that destroys the flavor profiles of the ingredients and thus necessitates the need for synthetic perfumes to simulate the taste of said ingredients.
That being said, wheat gluten (read the books Grain Brain and What's With Wheat), high-fructose corn syrup and vegetable (corn, sunflower and canola) oils seem to be the main drivers of obesity. They put that crap in everything.