Ever been to a grocery store that has your email address on file? (Some stores with the reward card systems have that logged).
I’d think it’d be a nice idea to offer an opt-in service that will email you something that gives you an idea of what’s there in your groceries, nutritionally. eg: Buy some oatmeal, get nutritional suggestions that include things like honey or sugar being added to oatmeal, or fruit being added, stuff like this.
It’d have to be opt-in, since people whine about this otherwise, but it would go a long way to put things like this in people’s faces.

Hard to get excited when all that really happens is businesses push out their already low-end, low priced stuff, and cut its throat, knowing that when it sells out, the people who crowded the store and waited out in the cold will buy something else that makes the stores even more money, just so they don’t go home empty-handed.