John Harvey Kellogg was an American doctor, health activist, inventor and businessman best known as the co-inventor of breakfast cereal corn flakes. Born and raised in Tyrone, Michigan, John wanted to become a teacher as a teenager. At the age of 16, he began teaching at a district school in Hastings, Michigan. He later enrolled into a teacher’s training course and studied medicine on the insistence of his parents, at New Jersey. He later received an M.D. from Bellevue Hospital Medical College located in New York City. Kellogg was raised in a highly religious family and was himself a Seventh - day Adventist, a Protestant Christian denomination. He served as the chief medical officer at the Battle Creek Sanitarium, operated by the Adventist Church. He made it a mission to explore and preach about the harmony between science and the Bible. He propagated vegetarianism, abstinence from alcohol and sex. He invented several vegetarian food items and is best known as the inventor of the breakfast cereal corn flakes. He made it as a light breakfast that is easy to chew and digest. He is also credited with inventing peanut butter. He was a staunch supporter of the ‘Biologic Living’ and put forth several other theories to promote healthy food habits.