Tortillas being made at the El Milagro plant in San Marcos, Texas. The FDA is weighing whether to allow fortifying corn masa flour with folic acid, aka vitamin B9. The FDA currently bans the practice, but researchers say adding the vitamin to corn masa could help battle higher rates of severe neural tube defects among Hispanics.
Verónica Zaragovia for NPR
One of the great public-health success stories of the past couple of decades can be found in your cereal bowl.
Since 1998, the Food and Drug Administration has required that breakfa…