Post Grape Nuts were introduced in 1898 and sucessfully marketed as a "scientific food" sold in small packets "because it was concentrated."
Charles W. Post spent almost a year as a patient at the Battle Creek Sanitarium in 1891, unsuccessfully. He left, and was soon cured of his health problems by a Christian Science follower (a religious system founded Mary Baker Eddy). Post opened his own health retreat, and in 1897 used Dr. Jackson's basic recipe for Granula to develop Grape Nuts breakfast cereal. Because of his marketing abilities, it soon became a success.