"Dr. Kellogg appointed Lenna as the Chief Dietitian of the Battle Creek Sanitarium and the Director and Dean of the Battle Creek Sanitarium School of Home Economics. The School of Home Economics began in 1906, offering a one- year course for matrons and housekeepers. In 1907, a two- year course to instruct teachers and lecturers was offered. All courses included training in the Sanitarium’s philosophy of health through “biologic living.” The growing demand for trained dietitians for hospitals led to the school’s development of a two-year comprehensive course in dietetics to be included in its curriculum. Vegetarian nutrition and cooking was the foundation of the dietetics courses taught at the school under Lenna’s supervision. More than 500 dietitians graduated from Battle Creek under her tenure. Lenna became a leading proponent for health care through diet and a pioneer in the field of vegetarian nutrition and dietetics."