May 21/New York/Pediatrics -- The rates of three rare childhood cancers have dropped since the U.S. began to fortify some foods with folic acid, a new study says.
The rate of Wilms' tumors, which develop in the kidneys, dropped from 18.4 yearly cases per 1 million children to 14.8 yearly cases per 1 million children, the study showed, after folic acid fortification of grain foods began in 1996.