If you are grabbing a bag of corn tortillas or a sack of masa harina in California next week, the recipe is about to get a quiet tweak. Starting next Thursday, the state will require most commercially sold corn tortillas and corn masa products to include added folic acid, a public health move aimed at preventing serious birth defects.
The new rule covers packaged masa harina, tortillas and other processed corn masa products sold in stores. Restaurants and small bakers that grind or make masa on site are exempt, which means your favorite taqueria can keep doing things the old-fashioned way.
What the law requires
Assembly Bill 1830, codified as Health & Safety Code §110531, sets specific fortification levels. Corn masa flour that is manufactured, sold or used in foods in California must contain 0.7 milligrams of folic acid per pound. Wet corn masa products are allowed to contain 0.4 milligrams per pound. Manufacturers also have to list folic acid on the Nutrition Facts panel.
The measure takes effect next Thursday. The statute and its key requirements are laid out in a state health department FAQ from the California Department of Public Health.
Why public health officials backed it
Lawmakers and health advocates pointed to stark gaps in folic acid use. About 28% of Latina women in California reported taking folic acid in the month before pregnancy, compared with roughly 46% of white women, according to data highlighted by CalMatters. Fortifying a staple food that many families already eat regularly is pitched as a way to narrow that gap without relying solely on supplements.
Clinical research shows that getting enough folic acid around the time of conception can sharply cut the risk of neural tube defects, in some studies by as much as roughly 70%. After the federal government required folic acid fortification of many grain products in the late 1990s, neural tube defects declined substantially, a trend public health officials often cite in support of a similar requirement for corn masa, including analyses published in JAMA.
Assemblymember Joaquin Arambula, who carried AB 1830, has called the earlier omission of corn masa from fortification rules “a real oversight,” especially given how central corn tortillas and masa-based foods are in many Latino households.
Industry response and what will change on shelves
The law builds on a 2016 decision by the FDA that allowed, but did not require, manufacturers to add folic acid to corn masa flour. At that time the agency set a safe level of up to 0.7 milligrams per pound for voluntary fortification.
After that federal green light, some major players moved first. Companies such as Gruma, the parent of Mission Foods, say they began fortifying masa products following the 2016 approval and have voiced support for efforts to broaden fortification, according to Gruma.
Brands that have not yet fortified will need to reformulate or relabel in order to keep selling into California. Over the coming months, shoppers are expected to see updated ingredient lists and Nutrition Facts panels as companies adjust to the new rule.
Who is exempt and how small makers are treated
AB 1830 carves out exemptions for cottage food operations and for food facilities such as restaurants that make masa on site. Those businesses can keep selling unfortified masa and masa-based products.
Grocery stores get a middle-ground rule. They may sell unfortified masa, but only if they also offer fortified options on the shelf. State guidance spells out how different types of businesses are expected to comply, including timelines and labeling expectations for suppliers and retailers, in materials from the California Department of Public Health.
Health caveats experts mention
Public health proponents argue that, at the population level, folic acid fortification delivers clear benefits. At the same time, nutrition reviews and clinical researchers urge some caution on the margins. High intakes of synthetic folic acid can mask vitamin B12 deficiency in older adults, a concern noted in a clinical review hosted by PubMed Central.
Some research has also raised questions about unmetabolized folic acid at very high exposures. Those potential downsides have not shifted the basic case for preventing neural tube defects, but experts say they are a reason to maintain surveillance and keep clinicians alert to B12 issues and overall intake, consistent with guidance from the National Academies.
Bottom line for Californians
Starting next Thursday, many store-bought corn masa products in California will quietly add one more line to their labels. Shoppers should see “folic acid” listed on ingredient statements or Nutrition Facts panels for a wide range of corn tortillas and masa-based goods, while restaurants and small bakeries operating under the law’s exemptions can keep producing fresh, unfortified masa.
For the exact legal language, Californians can read Health & Safety Code §110531 as published on Justia, and for a plain-language explainer on how and why this happened, there is additional coverage from CalMatters.
