Frank A. Sawall, who earlier worked with John Harvey Kellogg, began selling powdered mineral drinks door to door and lecturing around the United States on the benefits of vitamin and mineral supplements, before opening Sawall Health Food Products, Inc., in 1936, the United States' oldest family-owned natural foods store still in existence today. It began with powdered minerals and vitamins and also sold natural and organic foods. Frank A. Sawall, a bio-chemist, was described as "America's Outstanding Health Teacher and Nationally known Nutritionist" in newspapers across the United States.