It woud be revealing to see *all* the food in an average grocery store broken down into individual ingredients and then summed to see what we're truly consuming. Feel like most people walk out the walk out the doors with bags filled with crap and pretty packaging.
There are studies out there breaking down what percentage of carts are filled with garbage:
73 freaking percent
I figured most people who look into eating healthy have heard the guideline about avoiding the middle aisles. Basically, everything that's good for you is around the perimeter of the store, and almost everything in the middle aisles are garbage. Exceptions, obviously. I think I always grab lentils and coffee from middle aisles, but really, it's sort of creepy that you can go down entire aisles in the store, where everything in that aisle is actively bad for you.