The Incredible Edible Egg! Is a slogan has been around since 1976 and was updated in 2017 to The Incredible Egg. The American Egg Board uses this slogan to promote eating eggs as part of a healthy diet. Eggs are truly incredible. They are full of good nutrition, easy to prepare, inexpensive, and can be a part of a healthy diet. Simply put eggs are eggs, there is nothing else in them, just one ingredient…egg.