Florida just subpoenaed General Mills over an additive most of the world banned

On July 13, 2026, Florida's attorney general subpoenaed General Mills. Not over an ad claim or a recall — over what's inside four bulk flour products: Pillsbury Potentate High Gluten Flour, Pillsbury Best Bakers Patent Flour, Gold Medal All Aces Bakery Flour and Gold Medal Superlative Bakers Flour.

The chemical in question is potassium bromate, and the state wants to know whether it's being used within the FDA's own limits — in a school supply chain, going back to 2023.

Bromate isn't the only flour additive with this exact profile: legal and GRAS-listed in the US, banned across most of the rest of the world, and back under formal FDA review for the first time in decades. Azodicarbonamide — the so-called "yoga mat chemical" — is the other one, and both belong on the same list as the bleaching agents we've written about before.

What Florida is actually asking

According to Baking & Snack's coverage of the subpoena, Florida Attorney General James Uthmeier issued it under the state's Deceptive and Unfair Trade Practices Act. No violation has been found — the subpoena is a request for information: product lists, top purchasers from 2023 through 2026, the products' presence in school food supply chains, and any internal health research General Mills holds. The stated goal is to check compliance with the FDA's permitted bromate threshold. State Representative Meg Weinburger has said she plans to reintroduce legislation to ban the additive outright. General Mills has not issued a public response. Treat this as an open investigation, not a finding — nobody has published a result yet.

What potassium bromate actually is, and what the law allows

Bromate is a dough conditioner. It's an oxidizing agent that strengthens gluten strands, so bread rises higher and holds its shape — a cheap way to get a taller, fluffier loaf out of cheaper flour.

The FDA regulates it in two places for baking flour specifically. Under 21 CFR 137.155, bromated flour can carry up to 50 parts per million. Under 21 CFR 137.205, bromated whole wheat flour goes up to 75 ppm. Both rules say the additive can only be used when it demonstrably improves the flour's baking performance — not as a default.

Here's the part that makes the US an outlier. According to a detailed regulatory summary from Policy Canary, potassium bromate has been banned as a food additive in the EU and UK since 1990, Canada since 1994, Brazil since 2001, China since 2005, and India since 2016. In 2012, the Codex Alimentarius Commission — the joint FAO/WHO body that sets international food standards — withdrew its bromate specifications entirely.

The health basis for those bans traces back to IARC's 1999 review, which classified potassium bromate as Group 2B — possibly carcinogenic to humans, citing kidney tumors, thyroid follicular cell tumors and peritoneal mesothelioma in animal studies, alongside what the agency called inadequate evidence in humans. That is a real classification, not a fringe claim — and it's also, by IARC's own definition, a weaker tier of evidence than a proven human carcinogen. Coffee and aloe vera whole-leaf extract have carried the same 2B label at different points.

Why is bromate still legal here? Mechanically, the same reason as bleached flour: it predates the modern food-additive approval system and has never been formally pulled, even though the FDA opened a fresh "Review of Information" on it in March 2024 that, per Policy Canary, still has no rulemaking timeline.

Azodicarbonamide: the one with a documented removal playbook

Azodicarbonamide (ADA) does a similar job to bromate — a dough conditioner and flour bleaching agent — but it's the one most people have actually heard of, because of a 2014 petition campaign.

CBS News's contemporaneous coverage is worth reading because the story holds up: after a food blogger's petition pointed out that ADA is also used to make foamed plastics like yoga mats and shoe soles, and that Australia and Europe had already banned it from food, Subway confirmed it was already in the process of removing ADA from nine bread varieties, including its 9-grain wheat and Italian white. The World Health Organization has linked occupational ADA exposure to asthma and skin irritation, and when ADA is baked, it breaks down into semicarbazide — a compound tied to tumors in animal studies.

The US limit is set in the same flour-bleaching regulation as benzoyl peroxide: 21 CFR 137.105 caps azodicarbonamide at 45 ppm. It has been banned as a food additive in the EU since 2005, and in the UK, Australia and China as well.

ADA is back under a formal FDA safety review too. Per Flavorist's coverage, the agency opened a review of ADA and the preservative BHT in late May 2026, requesting current usage data from manufacturers. Acting FDA Commissioner Kyle Diamantas framed it as routine oversight — "ensuring chemicals in the U.S. food supply remain safe as new evidence emerges" — and the baking industry has separately signaled it will eliminate ADA entirely by the end of 2026, more than a decade after Subway's move.

California already picked a date

While the FDA reviews sit open-ended, one state has already set a deadline. AB 418, the California Food Safety Act, signed October 2023, bans potassium bromate from food sold in California starting January 1, 2027, alongside propylparaben, brominated vegetable oil and Red Dye 3. Per Policy Canary, violations carry civil penalties up to $5,000 for a first offense and $10,000 after that. Azodicarbonamide is not on the California list — its removal so far has come entirely from voluntary brand decisions and international bans, not US law.

What we're not claiming

Bromate's cancer classification is 2B — possible, based on animal data, not confirmed in humans — and the FDA's own permitted levels are well below the doses used in those animal studies. Nobody has published a finding that any General Mills product currently violates the federal limit; Florida's subpoena is a fact-finding step, not a verdict. And both additives are already fading out of the US supply on their own: most major commercial bread brands dropped ADA years ago, and the baking industry has now committed to a 2026 end date on it industry-wide. The honest headline here isn't "poison in your bread" — it's that two additives most of the developed world decided weren't worth the risk are still legal defaults in American flour, regulated by rules written decades before anyone reopened the question.

How to shop this

1. Check the ingredient list for "bromated flour," "potassium bromate," or "azodicarbonamide." All three must be named directly under FDA labeling rules — they don't hide behind "dough conditioner" alone, though some labels do use that vaguer term for a blend that could include either.
2. Bagged, bulk and food-service flour is the likelier place to find bromate, since the Florida subpoena is about supply-chain flour, not finished consumer loaves. Most major consumer bread brands do not currently list it.
3. ADA is close to gone regardless — Subway removed it in 2014, and the wider baking industry has committed to phasing it out by the end of 2026. If you see it on a label after that, it's worth asking the brand why.
4. A short ingredient list is still the fastest signal. Flour, water, yeast, salt is the floor. Anything beyond that is solving a shelf-life or texture problem, not a nutrition one.

Tallow scans the barcode and flags additives like these before they're in your cart, so you don't need to memorize a CFR number to know what's in the bag. Check your flour and bread on Tallow.

Figures and regulatory citations in this post come from the federal regulations as currently codified, the Baking & Snack, CBS News, Flavorist and Policy Canary reporting linked above, and California's AB 418 as signed. Florida's investigation is ongoing and no violation has been determined as of publication. This is not medical advice.