Banned in Europe, Food Coloring Linked to Behavior Problems

In 1976, M&M candies discontinued their “Red M” amidst concerns over the potentially fatal risk of red food coloring that contained amaranth (in FD&C Red #2), suspected as being cancer-causing. Though M&M did not use this dye in the product pulled from store shelves, fears about red-dyed foods were so heightened, the red-colored candy did not return for more than a decade.