 As a new member of the Food and Nutrition Board, McCollum was part of the decision in 1941 to enrich bread and flour with thiamine, niacin, and iron.McCollum was critical of the decision; while he agreed that white bread has nutritional deficiencies, he felt that this action did not compensate for all of the nutrients that are stripped away by milling.In the ensuing controversy, McCollum's status was changed from "board member" to "panel member" and he was no longer invited to board meetings.