Lots of people talk a good game about eating more natural foods, but a new study suggests that the convenience of “ultra-processed” meals is just too hard to resist. Researchers found that nearly three in five of our calories come from this category, reports the Los Angeles Times. That raises a host of health concerns, given that these foods are loaded with sugar, preservatives, artificial flavors, colors—generally speaking, the unpronounceable stuff in ingredient lists. So what qualifies as “ultra-processed”? Think breakfast cereals, frozen pizzas, soda, cookies, salty snacks, etc. The study in the journal BMJ Open looked at what more than 9,000 participants ate over a 24-hour period and found that 58% of the average 2,070 calories consumed qualified for the “ultra-processed” label.