There has to be some medium between slathering ourselves with so many chemicals that we turn into Springfieldesque three-eyed fish and being afraid of absolutely every ingredient in our cosmetics other than water, right? Arm yourself with the Consumer's Dictionary of Cosmetic Ingredients ($12) and you'll be able to look up pretty much anything that appears in that tiny print on the back on the package. Components are listed alphabetically, and their purposes and possible effects on your health are described in plain English. Aren't you curious about why you shouldn't eat green eyeshadow? There's even a $10 Kindle edition!