John Harvey Kellogg (February 26, 1852 – December 14, 1943) was an American medical doctor in Battle Creek, Michigan.
Kellogg ran a sanitarium using holistic methods, with a particular focus on nutrition, enemas and exercise. Kellogg was an advocate of vegetarianism and is best known for the invention of the breakfast cereal known as corn flakes with his brother, Will Keith Kellogg.
He led in the establishment of the American Medical Missionary College. The College, founded in 1895, operated until 1910 when it merged with Illinois State University.
John Kellogg and his brother Will Keith Kellogg started the Sanitas Food Company to produce their whole grain cereals around 1897, a time when the standard breakfast for the wealthy was eggs and meat, while the poor ate porridge, farina, gruel, and other boiled grains. John and Will later argued over the recipe for the cereals (Will wanted to add sugar to the flakes). So, in 1906, Will started his own company, the Battle Creek Toasted Corn Flake Company, which eventually became the Kellogg Company, triggering a decades-long feud. John then formed the Battle Creek Food Company to develop and market soy products.
The Kelloggs did not invent the concept of the dry breakfast cereal. That honor belongs to Dr. James Caleb Jackson, who created the first dry breakfast cereal in 1863, which he called, “Granula.” A patient of John’s, C. W. Post, would eventually start his own dry cereal company, Post Cereals, selling a rival brand of corn flakes. Dr. Kellogg later would claim that Charles Post stole the formula for corn flakes from his safe in the Sanitarium office.