The U.S. Food and Drug Administration banned the dye known as Red 3 from the nation’s food supply in January, setting ...

Dissolve the picric acid in water, add sufficient sulphuric acid to give the mixture a slightly acidulous taste, and then add carmine of indigo according to the shade of green desired. To dia silk ...

An curved arrow pointing right. Cochineals are tiny bugs that live on prickly pear cactuses. The acid in their guts makes a red dye used in textiles, cosmetics, and foods like M&Ms and Yoplait yogurt.

Natural dyes may be less stable than synthetic dyes and may be affected by factors including heat and acid levels. The best way to avoid harmful dyes is to read ingredient labels, said Dr. L.

Natural dyes may be less stable than synthetic dyes and may be affected by factors including heat and acid levels. “It’s not impossible to replace, but there’s not a single solution,” she ...