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'''John Harvey Kellogg''', M.D. (February {{LifeData |birth=1852-02-26|birthplace=Tyrone Township, 1852 – December Michigan |death=1943-12-14|deathplace=Battle Creek, 1943Michigan}}) was an American medical doctor in Battle Creek, Michigan, who 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.