The Food and Drug Administration has finally taken action on a popular chemical. Bisphenol A, commonly known as BPA, can no longer be added to baby bottles and cups for young children, according to the F.D.A. Many manufacturers had already stopped adding BPA to their products, but now parents can be sure that the chemical won't show up in their child's drink.
Florence Williams was a breastfeeding mother when she became concerned with just that. What was she feeding her children, after all? In her recent book, "Breasts: A Natural and Unnatural History," she uncovers the many chemicals that find their way into adults' and infants' bodies.