The article on "Iron Intake, Hemoglobin, and Physical Growth" (Pediatrics, 30:518, 1962) merits special comment. Although this represents years of careful observation of healthy infants and children, the hematologic data offered on them are meager. They do not clearly support the authors' contention that iron intake does not appear to be directly reflected in hemoglobin levels at 2 years of age. At 1 year this relationship certainly does not hold true from an analysis of their own data. As a matter of fact, 1 year of age is a more critical time to evaluate the relationship of iron to hemoglobin, because during the first year, growth is more rapid and dietary inadequacies are more likely to occur.