Plus, new research on anesthesia and a brain tumor radiation device Eating a diet high in ultraprocessed foods is associated with an increased risk of dementia, according to new research, adding to the growing list of health problems linked to foods such as packaged cookies, hot dogs and chips. The Health newsletter takes you inside what’s new in health, medicine and personal well-being. If you’re not subscribed, sign up here. Copyright ©2026 Dow Jones & Company, Inc. All Rights Reserved.