Nutrition Action has a list of 10 foods that you should never eat. Sound serious. Yes. The site also mentions the brand names (which really assume me), but some of their advices can generalize into similar products. For example, the Burger King french fries:
Burger King makes some of the worst french fries you can buy at a fast–food restaurant. Thanks to the salty coating that allows more oil to be absorbed, a King Size order of their fries packs 590 calories and 30 grams of fat — 12 of them artery–clogging. That’s worse than McDonald’s Super Size Fries — and more than half the “bad” fat you should get in an entire day.
10 Super Foods You Should Never Eat – [Nutrition Action]