The EU is banning food whitener titanium dioxide. It is the latest example of a chemical deemed unsafe in Europe that’s still used in the US

There’s a hidden ingredient used as a whitener in an array of foods, from candies and pastries to cheeses and gum. It’s called titanium dioxide, and while commonly used in the US, it’s being banned in the EU as a possible carcinogen.

The additive, also known as E171, joins a host of other chemicals that are banned in foods in the European Union but allowed in the US.

These include Azodicarbonamide, a whitening agent found in food such as breads, bagels, pizza, and pastries in the US, which has been banned in the EU for more than a decade. Known as the “yoga mat’’ chemical because it is often found in foamed plastic, the additive has been linked to asthma and respiratory issues in exposed workers and, when baked, to cancer in mice studies.