From the article: > If the ingredients include artificial colors and chemicals that aren’t normally found in the kitchen, the item is likely ultra-processed.

From the article: > If the ingredients include artificial colors and chemicals that aren’t normally found in the kitchen, the item is likely ultra-processed. Curious to see sandwiches included in the list (and the top "offender", no less). Home-made ones can be pretty healthy! Edit to add: the study says: > "Ultra-processed foods tend to be hyperpalatable, energy-dense, low in dietary fiber, and contain little or no whole foods, while having high amounts of salt, sweeteners, and unhealthy fats". The study page also contains a more precise definition (using something called Nova classification).