yep. go to the store. 70% carbohydrates being sold there. The cheapest stuff. It's all filler, and we all fill up on it. Lot of people end up overweight on the common standard diet, and almost no one has good nutritional sense. Lots of people start off on the right foot, lots don't.
Eventually they're going to incorporate practical nutrition into health classes in school, so it'll be as comprehensive as quadratic equations. Go beyond the food pyramid and what little they tell you about cholesterols, and fucking esplain what a goddamn ester is. And make sure they understand, not just taking notes.