The federal government recently announced plans to phase out eight artificial food dyes and colorings from the food supply by the end of 2026, citing concerns they cause a range of health conditions including obesity, diabetes, attention deficit hyperactivity disorder and cancer. The ban has been a priority for health secretary Robert F. Kennedy Jr. We asked Emily Barrett, a professor in the School of Public Health, to explain what the research says about food dyes and how they became a cause for concern. To read the full story.