Ultra-processed foods are undergoing increased scrutiny as Health and Human Services Secretary Robert F. Kennedy, Jr. and his supporters blame these often tasty snacks for contributing to chronic diseases in the U.S.

But what is ultra-processed food? There still isn’t a universal definition.

While many ice creams, chips and sodas are considered ultra-processed, there’s also a wide array of other foods that can be included in a healthy diet that fall into the same category, such as tofu, some canned fruits and vegetables, protein bars, cereals and nut milks.

“These are all quite processed and some of them can be classified as ultra-processed foods but because of their nutrient profiles, they might be better for us and not associated with the worst health outcomes,” said Michele Polacsek, professor of public health at the University of New England and an expert on promoting healthy food choices.

Does that mean these foods will be targeted, too? Probably not, said Marion Nestle, a nutrition expert and emeritus professor at New York University.