Fortification of cornmeal, grits, rice, and white flour is required by law in the US. https://www.law.cornell.edu/uscode/text/7/1431c https://www.law.cornell.ed

Fortification of cornmeal, grits, rice, and white flour is required by law in the US. https://www.law.cornell.edu/uscode/text/7/1431c https://www.law.cornell.edu/uscode/text/7/1431c For more examples of interventions recommended by the WHO take a look at: http://www.who.int/elena/intervention/en/ http://www.who.int/elena/intervention/en/ especially the fortification section.