Health warnings are being issued related to an Easter fan favorite. Certain colors of Peeps marshmallows are being linked to cancer. The artificial coloring called Red Dye No. 3 is a known carcinogen. Consumer Reports flagged nine different Peeps and other candies manufactured by Just Born Quality Confections, including pink and lavender Peeps along with Hot Tamales candy and Wildberry Marshmallow Bunnies.