What was Kellogg first product?

Kellogg's first product was Granose, a type of toasted corn flake, created by Dr. John Harvey Kellogg in the late 19th century. This product was part of his health-focused philosophy at the Battle Creek Sanitarium, where he promoted vegetarianism and healthy eating. Granose laid the foundation for the company's future success in the breakfast cereal industry. Eventually, the company evolved to produce a wide variety of cereals, with Corn Flakes becoming its flagship product.