The U.S. Food and Drug Administration asleep at the wheel again.

The Guardian reports:

Give us this day our daily foam expander. It may sound odd, but in America, your loaf of bread can contain ingredients with industrial applications – additives that also appear in things like yoga mats, pesticides, hair straighteners, explosives and petroleum products.

Some of these chemicals, used as optional whiteners, dough conditioners and rising agents, may be harmful to human health. Potassium bromate, a potent oxidizer that helps bread rise, has been linked to kidney and thyroid cancers in rodents. Azodicarbonamide (ACA), a chemical that forms bubbles in foams and plastics like vinyl, is used to bleach and leaven dough – but when baked, it, too, has been linked to cancer in lab animals.

Other countries, including China, Brazil and members of the European Union, have weighed the potential risks and decided to outlaw potassium bromate in food. India banned it in 2016, and the UK has forbidden it since 1990. Azodicarbonamide has been banned for consumption by the European Union for over a decade.

But despite petitions from several advocacy groups – some dating back decades – the US Food and Drug Administration (FDA) still considers these to be Gras or “generally recognized as safe” to eat, though plenty of experts disagree.

“The system for ensuring that ingredients added to food are safe is broken,” said Lisa Lefferts, senior scientist at the consumer advocacy group Center for Science in the Public Interest. Lefferts, who specializes in food additives, said that once a substance was in the food supply, the FDA rarely took further action, even when there was evidence that it isn’t safe.