Postprint version. Published in Early Human Development, Volume 53, Issue 3, January 1, 1999, pages 251-269.
The definitive version is available at https://doi.org/10.1016/S0378-3782(98)00080-2.
Coffee is commonly given daily to toddlers in Guatemala. Possible negative effects of coffee ingestion on cognitive development and sleep patterns were assessed in 132 children 12–24 months of age who had received coffee for >2 months and were iron deficient on at least one indicator. Children were stratified by initial hemoglobin (A=anemic, Hgb