California is banning them in schools. The FDA says they’re fine. But synthetic dyes added to food to make them more colorful have a long, troubled history.

As synthetic food dyes make their way into everyday snacks and beverages, the debate over their safety intensifies. While these bright, enticing colors add appeal to foods, experts continue to ...

The mixture of red, purple, orange and yellow is the result of chemical processes ... the leaves stop their food-making process. The chlorophyll breaks down, the green color disappears, and the yellow ...