[1][2] Jackson and many of his contemporaries believed that the digestive system was the basis of illness.
He therefore began experimenting at his upstate New York health spa with cold cereal as an illness cure; the development of Granula was the outcome of his experiments.
[3] Granula could be described as being a larger and tougher version of the somewhat similar later cereal Grape-Nuts.
[2] However, it consisted primarily of bran-rich graham flour made into nugget shapes.
[4] The cereal was manufactured from a dough of graham flour rolled into sheets and baked.