Hard to Swallow

As its subtitle suggests, this book presents the truth about food additives - what they are, what they do, how they are approved and regulated (essentially, somebody sticks it in a food and if it doesn't kill anyone right off, it's deemed safe and stays approved unless there is incontrovertible evidence to the contrary), and the role governments play (or, more often, don't play) in regulating what goes into our food.