rdf is citing brand name products sold in the traditional supermarkets here.  But it should be said that organic and unprocessed and otherwise natural foods are becoming increasingly available to the vast majority of Americans.  At first it was just specialized stores like Whole Foods, etc.  But now mainstream chains, even WalMart have increasingly large sections devoted to organic foods.  Which is not to say most Americans don't eat overprocessed food.  I think they do.  But there are alternatives for many people.  

"Pretending that you already know the answer when you don't is not actually very helpful." ~Migeru.