The following comments are offered in criticism of certain conclusions drawn by Rios et al. in their article in Pediatrics. Although we can only agree with the authors that there is a need for definition of the many factors influencing iron absorption, including the precise effect of specific iron sources, we do vigorously protest the presentation of their 1971 studies as representative of current practices in infant cereal enrichment. Changes in the iron enrichment of infant cereals made five and three years ago have not been evaluated and, from their article, one can infer that baby food manufacturers have been derelict in utilizing iron with high bioavailability.