We thank Karp et al for their comments on our study examining national secular trends in iron deficiency among US toddlers from 1976 through 2002. It is certainly possible that food insecurity plays an important role in mediating the association between overweight and iron deficiency in Latino toddlers by contributing to the intake of calorie-dense, nutrient-poor foods. In fact, a recent analysis of NHANES IV found that household and child food insecurity are associated with being at risk for overweight in children who are 3 to 5 and 12 to 17 years old, white or Mexican American, and living in families with incomes at or below the poverty threshold.1 Additional research, however, is needed to clarify the interrelationships among food insecurity, overweight, and iron deficiency.
Brotanek JM, Flores G, Weitzman M. Iron Deficiency, Obesity, and Food Insecurity—Reply. Arch Pediatr Adolesc Med. 2008;162(12):1195-1196. doi:10.1001/archpedi.162.12.1195