Florida's attorney general just subpoenaed General Mills over an ingredient sitting in bags of flour on grocery shelves right now. It isn't a hidden one. It's been legal in American bread for generations.
On July 13, 2026, Florida Attorney General James Uthmeier issued a civil subpoena to General Mills and General Mills Operations, LLC, seeking records on potassium bromate in bromated flour products, including specific Pillsbury and Gold Medal lines, sales to Florida schools, customer disclosures, and internal safety research. The action was filed under the Florida Deceptive and Unfair Trade Practices Act — a consumer-disclosure statute, not a food-safety recall. Uthmeier's stated position: "Floridians have a right to know what is in the food they buy and feed their children."
That subpoena didn't come out of nowhere. The FDA itself opened a formal review of potassium bromate on March 4, 2024, under its post-market chemical review process. As of this writing, that review remains in the "Review of Information" stage — no proposed rule, no revocation, no deadline. The agency's own review page says it has been working with the American Bakers Association to help manufacturers improve baking technique so residual bromate levels stay low, which is a harm-reduction approach, not a removal.
States aren't waiting on Washington. California's AB 418, the California Food Safety Act, will prohibit the manufacture and sale of any food containing potassium bromate — alongside brominated vegetable oil, propylparaben, and Red No. 3 — starting January 1, 2027. New York's legislature passed its own Food Safety and Chemical Disclosure Act this spring (the Senate on March 23, the Assembly 106–32 on April 21), which would ban potassium bromate and force food companies to disclose ingredients they've internally deemed "generally recognized as safe" without FDA review. As of this writing it sits on Governor Hochul's desk, unsigned.
To understand why a subpoena and two state statutes are converging on this ingredient now, it helps to know what it actually does and how long regulators have been watching it. Potassium bromate is a dough conditioner and oxidizer — it strengthens gluten and helps bread rise higher and more evenly, which is why it became popular with commercial bakers decades ago. The FDA's own bakery-product standard, 21 CFR §137.155, still names "bromated flour" as a defined category and permits potassium bromate at up to 50 parts per million, but only in flours "whose baking qualities are improved by such addition." That rule was written before most of the toxicology research existed.
The research thread starts with the International Agency for Research on Cancer, which evaluated potassium bromate in 1986 and again in 1999, both times classifying it Group 2B — "possibly carcinogenic to humans." IARC's own summary describes sufficient evidence in animal studies (kidney tumors, thyroid tumors, and peritoneal mesotheliomas in rodents) attributed to oxidative damage in kidney tissue, alongside inadequate evidence in humans. California acted on that finding well before its 2027 manufacturing ban: it added potassium bromate to the Proposition 65 list effective January 1, 1990, using the "authoritative bodies" listing mechanism and citing IARC's determination directly.
Here's where the framing matters. The regulatory disagreement isn't "Europe knows something America doesn't" — it's two different systems reaching different defaults. The UK moved first and explicitly: Scotland's 1990 flour regulations formally revoked potassium bromate's permission as a flour improver, effective that April. The EU's Regulation 1333/2008 works differently — it requires every food additive to appear on the Union's own authorized list before anyone can use it, and potassium bromate simply isn't on that list. That's a permission the ingredient never received under the post-1990s EU framework, not a headline ban. The FDA, by contrast, operates on a permit-until-reviewed model: an additive stays legal unless the agency affirmatively acts, which is exactly the gap Florida's subpoena and California's legislature are stepping into. Florida's own announcement claims potassium bromate is also barred in Canada, China, and India — that's the state's characterization in its press materials, not something independently confirmed here.
On a U.S. label, potassium bromate shows up by that name in an ingredient list, or the product may simply be described as using "bromated flour." Many national retail bread brands moved away from it over the past two decades, but bulk and food-service flour — the kind sold to bakeries, pizzerias, and school cafeterias, which is precisely what the Florida subpoena is chasing — is where it still commonly turns up. A bag labeled "unbromated flour," or one that lists neither term, hasn't used potassium bromate in that process. Starting January 1, 2027, the question becomes moot for anything sold in California, regardless of what the label says, because the ingredient will be prohibited outright.
This is the kind of story that's genuinely hard to track from a grocery aisle: a federal review sitting open with no deadline, a state ban two years out, another state bill awaiting a governor's pen, and an active subpoena, all pointed at the same ingredient, all moving at different speeds. PurityIQ doesn't resolve that into a score or a verdict — it puts the public record in front of you when you scan a product: what's currently permitted federally, what's changing and when, and which government body said what, cited back to the source. You see the record. You decide.
As of: August 6, 2026
Sources:
FDA, List of Select Chemicals in the Food Supply Under FDA Review | https://www.fda.gov/food/food-chemical-safety/list-select-chemicals-food-supply-under-fda-review
21 CFR §137.155, Bromated Flour | https://www.law.cornell.edu/cfr/text/21/137.155
California AB 418 (California Food Safety Act) Signing Statement, Governor's Office | https://www.gov.ca.gov/wp-content/uploads/2023/10/AB-418-Signing.pdf
Florida Attorney General press release, July 13, 2026 | https://www.myfloridalegal.com/newsrelease/attorney-general-james-uthmeier-launches-investigation-potassium-bromate-floridas-food
New York State Senate press release on the Food Safety and Chemical Disclosure Act | https://www.nysenate.gov/newsroom/press-releases/2026/brian-kavanagh/kavanagh-kelles-healthy-food-advocates-announce-passage
IARC Monographs Volume 73 (1999), Potassium Bromate summary | https://www.inchem.org/documents/iarc/vol73/73-17.html
IARC Monographs Volume 40 (1986), Potassium Bromate summary | https://www.inchem.org/documents/iarc/vol40/potassiumbromate.html
OEHHA/Proposition 65 Warnings, Potassium Bromate chemical page | https://www.p65warnings.ca.gov/chemicals/potassium-bromate
The Potassium Bromate (Prohibition as a Flour Improver) (Scotland) Regulations 1990, SI 1990/395 | https://legislation.gov.uk/uksi/1990/395/made?view=plain
Regulation (EC) No 1333/2008 on food additives | https://eur-lex.europa.eu/legal-content/EN/TXT/?uri=CELEX:32008R1333