The ingredient lists of your shampoo, makeup, and moisturizer are likely to include a dizzying number of unknown ingredients. What these ingredients are and do is a mystery to most consumers. However, many cosmetics contain ingredients that are linked to health problems and environmental concerns. While examining every ingredient in your beauty products would take a lot of research and time, there are a few ingredients that should be singled out because of their potentially harmful qualities. (Contains 5 online resources.)