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ABSTRACT:Iron deficiency reduces productive capacity in adults and impairs cognitive development in children. In 1943, the United States government required the fortification of bread with iron to reduce iron deficiency in the working-age population during World War II. This nationwide fortification of grain products increased per capita consumption of iron by 16 percent. I find that areas with lower levels of iron consumption prior to the mandate experienced greater increases in income and school enrollment in the 1940s. A long-term followup suggests that adults in 1970 with more exposure to fortification during childhood earned higher wages.
