Update on the impact of voluntary folic acid fortification of corn masa flour on red blood cell folate concentrations-National Health and Nutrition Examination Survey, 2011-March 2020.

Voluntary fortification of CMF with folic acid has yet to have a significant impact on the folate status of WRA. Continued monitoring and further research into factors such as fortified product availability, community knowledge, and awareness of folic acid benefits would inform and improve future public health interventions.