Someone didn't bother reading the article before getting uppity. It's literally on the second page.

>For nearly 30 years, folic acid, a key B vitamin, has been required to be added to enriched wheat and white breads, cereals and pastas in the U.S.

>Decades of research show the 1998 requirement cut rates of serious defects such as spina bifida and anencephaly by about 30%, preventing about 1,300 cases a year. It is regarded as one of the top public health triumphs of the 20th century.

>But corn masa flour, a staple used in Latino diets, was left out of the original fortification requirement — and rates of conditions such as spina bifida and anencephaly in that community have remained stubbornly high.