Ella Eaton Kellogg (April 7, 1853 - June 14, 1920) was an American pioneer in dietetics who taught and wrote on the subject. She was educated in Alfred University (B.A. 1872, A.M. 1875); and the American School Household Economics (1909). In 1875, Kellogg visited the Battle Creek Sanitarium, became interested in the subjects of sanitation and hygiene, and a year later enrolled in the Sanitarium School of Hygiene. Later on, she joined the editorial staff of Good Health magazine, and in 1879, married Dr. John Harvey Kellogg, superintendent of the Battle Creek Sanitarium.