The Trump administration on Tuesday announced plans to phase out petroleum-based artificial dyes from the nation’s food supply – a step the Department of Health and Human Services deemed a “significant milestone in the administration’s broader initiative to Make America Healthy Again.”

Robert F. Kennedy Jr., the health secretary, has called the dyes “poison” and long blamed artificial additives for chronic disease and illness in the United States.

Health and Human Services Secretary Robert. F. Kennedy Jr. unveiled a plan on Tuesday to start phasing out eight synthetic food dyes. Are they unsafe? Experts weigh in.