Can you pronounce 4-phenylenediamine? What about triethanolamine? Neither can I. Now, can you say high fructose corn syrup? Chances are you read your food labels carefully to avoid that particular sweetener. You probably also buy organic produce and dairy products. What surprises me is that many consumers pay so much attention to the ingredients that go into their food but so little attention to what goes on their skin, their largest organ.