Animal studies have linked high doses of food dyes to organ damage, cancer, and birth defects. In humans, food dyes have been linked to behavioral problems in children. ... 5, and concluded that artificial coloring was associated with increased hyperactivity in otherwise healthy children.

Is coloring harmful?

There is no conclusive evidence that food dyes are dangerous for most people. Nevertheless, they may cause allergic reactions in some people and hyperactivity in sensitive children.

Why is red coloring bad?

While the consensus from health organizations is that Red Dye 40 poses little health risk, the dye has been implicated in allergies and worsened behavior in children with ADHD. The dye goes by several names and is commonly found in dairy products, sweets, snacks, baked goods, and beverages.