This stimulating volume addresses vital questions about gene/environment interactions as they affect cell health from the prenatal period through later life. Beginning with a tour of epigenetic processes in the human body, the book assembles current theoretical and empirical developments across the discipline, among them transgenerational epigenetic inheritance, the effects of maternal nutrition on epigenetic change, and possible links between epigenetics and childhood obesity. Public health and policy aspects of the field are discussed in depth, with the understanding that much can be done to improve our epigenetic health as a species. And in this vein, contributors consider future possibilities, such as the reprogramming of genes to reverse cancer and other diseases.