There was a Dr Oz episode recently that showed how the food industry has us "hooked".
For example, a bag of chips or things like that, have lots of salt.
He had a large container of water (or some other solution) with red dye in it so you could see any action.
He then put in a pinch of normal salt and it bubbled up and you could understand the party your toungue gets when you eat it.
He then put in a pinch of this "Super Salt" that the food companies use and it reacted like a volcano. It was like Mardi Gras in your mouth.