A National Institutes of Health study aims to find out whether ultraprocessed foods lead people to eat more. And, if so, why? Teasing out the answers could shed light on the controversial fare that makes up more than 70% of the U.S. food supply. Ultraprocessed foods are linked to ailments including obesity and diabetes, but it’s not clear exactly how. Addressing chronic disease is a key goal of the “Make America Healthy Again” agenda embraced by President Donald Trump and Health Secretary Robert F. Kennedy Jr. Scientists say such research is difficult, time-consuming — and expensive. A National Institutes of Health study aims to find out whether ultraprocessed foods lead people to eat more. And, if so, why? Teasing out the answers could shed light on the controversial fare that makes up more than 70% of the U.S. food supply. Ultraprocessed foods are linked to ailments including obesity and diabetes, but it’s not clear exactly how. Addressing chronic disease is a key goal of the “Make America Healthy Again” agenda embraced by President Donald Trump and Health Secretary Robert F. Kennedy Jr. Scientists say such research is difficult, time-consuming — and expensive. AP Technology and Science