It has been discussed in natural medicine circles for years that many food additives have not been proven to be safe and may in fact be potentially detrimental to our health. Now the FDA is finally looking into one, the caramel coloring added to many colas and other foods, and whether it should be banned:
FDA Reviewing Potential Carcinogen of Caramel Coloring in Colas
Please note the side articles that discuss how one company in particular changed their soda formulation to avoid Prop 65 labeling in California of this potential carcinogen.