"Would you knowingly feed your children an ingredient derived from coal tar? That's exactly what you may be doing, if you let them eat any orange or yellow artificially-colored products including sodas, cheese-flavored products, flavored chips, pickles or a myriad of other foods and beverages. The industrial waste-derived coloring chemical tartrazine is a common ingredient in all these foods, underscoring the need to read food labels religiously." (Quoted from article)