the 22 amino acids, four vitamins (A, D, E, K) that are fat-soluble, nine water-soluble vitamins (C, and various B vitamins), one fatty acid, dextrose, at least thirteen minerals, water, and oxygen. In his article, he pictures five food groups. First among them is dairy, with the label, "Our best all around food...." Two years before he died, he and his wife attended the fiftieth anniversary of the founding of the National Dairy Council. He then traveled to Atlantic City, New Jersey, where he attended the first awarding of the McCollum Award by what is today the American Society for Nutrition, sponsored by the National Dairy Council. Public health advocacy He gave the Harvey Lectures in 1917, with the title, "The Supplementary Relations among Our Common Foodstuffs". McCollum's textbook The Newer Knowledge of Nutrition (1918) influenced many dietitians and went through multiple editions coauthored by Nina Simmonds and Elsa Orent-Keiles. In this book he introduced his idea of "protective foods". He wrote that the American diet was of poor quality because it had too much "white flour or cornmeal, muscle meats, potatoes, and sugar". He encouraged a daily quart of milk and plenty of green, leafy vegetables. Not surprisingly, McCollum also promoted lacto-vegetarianism. The fifth and final edition of his textbook appeared in 1939. Under the title "Our Daily Diet", between 1922 and 1946 McCollum wrote about 160 columns for McCall's magazine. He tackled topics like, "Are there such things as nerve foods?" and "Green vegetables are unbottled medicines." McCollum was the nutrition editor of the magazines McCall's and Parents. He was on the editorial boards of the Journal of Nutrition, the Journal of Biological Chemistry, and Nutrition Reviews. Long interested in the effect of diet on the teeth, McCollum was awarded medals by the Connecticut and Ohio dental societies and was a fellow of the New York society as well as an honorary member of the American Academy of Dental Medicine. His paper "The Effect Of Additions Of Fluorine to the Diet Of The Rat On the Quality Of the Teeth" (1925) described how excessive florine would negatively affect dental health in rats. Nonetheless, McCollum would later become a supporter of water fluoridation from the beginning of recorded evidence for the intervention. In 1938 the U.S. Public Health Service reported that adding fluoride to drinking water resulted in fewer dental caries. McCollum was moderator of "The Cause and Prevention