John Harvey Kellogg 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 corn flakes breakfast cereal with his brother, Will Keith Kellogg. Kellogg was a Seventh-day Adventist until mid-life and gained fame while being the chief medical officer of the Battle Creek Sanitarium, which was owned and operated by the Seventh-day Adventist Church. The San was run based on the church's health principles. Adventists believe in a vegetarian diet, abstinence from alcohol and tobacco and a regimen of exercise, which Kellogg followed, among other things. Kellogg was a skilled surgeon, who often donated his services to indigent patients at his clinic. As an advocate of sexual abstinence, Kellogg devoted large amounts of his educational and medical work to discouraging sexual activity, on the basis of dangers both scientifically based at the time - as in sexually transmissible diseases - and those taught by the Seventh-day Adventist Church. Kellogg was in favor of racial segregation and believed that immigrants and non-whites would damage the gene pool. Medical Legend