Red No. 3, a synthetic food dye ... Yellow 5 (Tartrazine), a lemon-yellow azo dye, is among the most widely used and recognized food colorants. Approved in the U.S., EU, Canada, and beyond ...

Medically reviewed by Corinne Savides Happel, MD Yellow 5, also known as tartrazine or FD&C yellow #5, is a synthetic yellow ...

But that is not the only dye concerning scientists. “Red 40, yellow 5, yellow 6, those are all azo dyes,” said Brandon Cawood. “I really felt that our story was hard to believe,” Whitney ...