A new study suggests dyes found in foods can worsen attention deficit hyperactive disorder in children.
Nearly 1 in 10 children suffers from ADHD, a disorder that makes it hard to focus. It can take a toll on academic performance.
The dyes are used in thousands of foods, everything from cereal to candy to chips and macaroni and cheese.
The food industry has insisted "the safety of artificial colors has been affirmed through extensive review."
An FDA panel will vote this week on whether to recommend warning labels on foods with the coloring.