Comment on this story Comment Anahad O’Connor will return next week. Valentine’s Day is almost here, with its roses, chocolate and other candy, the latter often colored with red dye No. 3, an additive that has been much debated for decades. “Roses and chocolates are wonderful, but I would think twice about giving your sweetheart those pink or red heart-shaped candies,” says Melanie Benesh, a lawyer and vice president of government affairs for the Environmental Working Group, a consumer advocacy organization that has compiled a list of the nearly 3,000 products containing the dye. In 1990, the Food and Drug Administration banned the use of red dye No. 3 —…