- The FDA finalized a new post-market food chemical safety assessment program on May 12, 2026.
- The agency launched formal reassessments of butylated hydroxytoluene (BHT) and azodicarbonamide (ADA).
- ADA, known as the "yoga mat" chemical, is used as a dough conditioner in bread and whitening agent in cereal flour.
- BHT is a preservative found in breakfast cereals, frozen meals, chewing gum and meat products.
- Public comment periods close July 13, 2026, as the FDA seeks data from manufacturers, researchers and consumers.
A defining moment for food safety
The U.S. Food and Drug Administration on May 12, finalized a sweeping new framework to reassess the safety of food chemicals already on the market, simultaneously launching formal reviews of two widely used additives that have drawn scrutiny from consumer advocates and health experts. The action represents a fundamental shift in how the agency monitors chemicals that have been in the food supply for decades, often with little post-market oversight.
The announcements target butylated hydroxytoluene, or BHT, a preservative found in frozen pizzas, breakfast cereals and chewing gum, and azodicarbonamide, or ADA, a dough conditioner nicknamed the "yoga mat" chemical for its use in manufacturing foam plastics. The reviews follow mounting pressure from Health and Human Services Secretary Robert F. Kennedy Jr., who has criticized what he describes as a lack of transparency in the FDA's original approval processes.
Streamlining oversight after decades of use
The FDA's finalization of its Enhanced Systematic Process for Post-Market Assessment of Chemicals in Food creates a structured mechanism to monitor, triage and prioritize chemicals based on new scientific evidence. A companion document, the Post-Market Assessment Prioritization Tool, ranks chemicals by potential public health risk using streamlined criteria.
"Americans want the FDA to take a fresh look at some of the chemical additives that have become widespread in our food supply," Commissioner Marty Makary said in announcing the program. The agency will evaluate how chemicals are used, current exposure levels and emerging hazard data.
The new program addresses a long-standing gap: chemical additives approved decades ago often received only limited review. The FDA has acknowledged that more than 5,000 additives remain in use today, with many linked to health concerns ranging from allergies to hyperactivity in children.
BHT: Preservative under the microscope
BHT has been used for decades to prevent rancidity in fats and oils, extending shelf life in a wide range of processed foods. It appears in breakfast cereals, baking mixes, cookies, frozen meals, meat products and chewing gum.
The additive works by blocking oxygen access to nutrients and microorganisms, essentially arresting life processes within food. Critics argue this same mechanism raises questions about its effects on human cells. Studies have connected chemical preservatives such as BHT and its close relative BHA—which the FDA is also reassessing—to potential health risks, though the agency notes previous approvals determined they were safe at permitted levels.
The FDA's request for information seeks updated data on usage levels, exposure estimates and any new toxicological studies.
ADA: From bread to yoga mats
Azodicarbonamide has drawn particular scrutiny because of its dual use as a dough conditioner and a plastic foaming agent. The additive whitens cereal flour and strengthens bread dough, but it also appears in yoga mats, shoe soles and other foam products.
Consumer advocacy groups have long questioned whether an industrial chemical belongs in food. Canada and the European Union restrict or prohibit ADA's use in food, while the United States continues to permit it. The FDA's reassessment will examine whether current exposure levels remain safe.
Commissioner Makary said the agency will "act swiftly based on our findings," though no timeline for final decisions has been announced.
Public comment opens as industry watches closely
The FDA has opened a 60-day public comment period closing July 13, seeking data from food manufacturers, researchers and consumers. The agency also continues to reassess meat preservative BHA and the rarely used Orange B food dye, signaling a broader review of chemical additives under the new program.
Deputy Commissioner for Food Kyle Diamantas called the framework a "systematic, transparent approach" that reinforces safety standards.
A new chapter in chemical oversight
The FDA's actions mark a departure from decades of reliance on initial approvals without systematic reexamination. As scientific understanding of chemical interactions with human biology advances, the agency faces pressure to ensure that yesterday's safe additives meet today's standards.
With more than 5,000 chemical additives still in circulation, the reassessment of BHT and ADA represents the opening phase of what could become a comprehensive reexamination of the nation's food supply. The outcome may reshape what ingredients appear on grocery store shelves—and which ones regulators decide no longer belong there.
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