Think of the politics of food advertising—remember someone is trying to convince you to eat their product, by making appeal to health, nutrition, price, nostalgia—through some means.
Take your local newspaper and look at the food advertising contained in adverts and flyers. What messages are being communicated?
Are certain foods advertised to attract different age groups, genders, ethnic groups?
What tells you this?
Do some carry misleading messages? Do they suggest a certain lifestyle, health benefit? Are they convincing?