Another unpublished experiment was carried out in the 1960s. Researchers at University of Michigan were given 18 laboratory rats. They were divided into three groups: one group received corn flakes and water; a second group was given the cardboard box that the corn flakes came in and water; the control group received rat chow and water. The rats in the control group remained in good health throughout the experiment. The rats eating the box became lethargic and eventually died of malnutrition. But the rats receiving the corn flakes and water died before the rats that were eating the box! (The last corn flake rat died the day the first box rat died.) But before death, the corn flake rats developed schizophrenic behavior, threw fits, bit each other and finally went into convulsions. The startling conclusion of this study is that there was more nourishment in the box than there was in the corn flakes.
Scary! You can read more here.