After graduating, he became medical superintendent at the Western Health Reform Institute in Battle Creek, established in 1866 by the Adventists to offer their natural remedies for illness. Many wealthy industrialists came to Kellogg's sanitarium for recuperation and rejuvenation. They were accustomed to renown breakfasts of ham, eggs, sausages, fried potatoes, hot biscuits, hotcakes, and coffee.
Kellogg’s breakfast became a hit especially when they introduced a new ready to eat cereal called Kellogg’s Toasted Corn Flakes. It was so good in fact that they created the first company which produced this type of cereal. They followed their signature breakfast cereal with a new Frosted Flake, Apply Jacks, Fruit Loops, Mini-Wheats, Rice Krispies, etc. For around 112 years, they’ve been the number one brand in cereal followed closely by General Mills (i.e. Cheerios, Trix, Cocoa Puffs, and Lucky Charms).