True Bread

The scientist had a group of test rats in a cage. The rats were all hungry — as rats usually are. The scientist began feeding them with a steady diet of only white bread, every day and every night. The rats seemed to like the bread very much, but before long all of those little test rats were dead! Somehow, the white bread was not able to sustain their life. Then the scientist did the same experiment again, but this time he used only real whole grain bread (bread made from the whole kernel of wheat, leaving no part out). The results of this test were quite different! The little creatures seemed to thrive. So, within this dark bread it seems there was a life-sustaining factor that was missing from the white bread...