Absolutely not. Granted, breast milk does contain trace amounts of the same chemicals found in cow's milk; our air, food and water supply; our very own bodies; and, yes, in formula. Yet it is still the "cleanest," best food you can feed your baby. And because of its newest additives, while formula may seem better for your baby than breast milk, it's not. So don't let your concern keep you from breastfeeding. Just eat the healthiest foods possible and drink clean water (bottled or filtered, if necessary).