While you may not know these dyes by name, they can show up in your foods. Red No. 40, for example, can be found in salami, Yellow No. 6 in chicken bullion and Blue No. 1 in canned peas.

Citing potential health risks, West Virginia's governor signed into law a ban of most food dyes and two preservatives in what marks the most sweeping move by a state in the country. The law ...