Which Beauty Products Are Harmful?

Nail Polish 1 of 11

Nail polish may be a beauty staple, but many varieties contain the chemical formaldehyde. This ingredient helps to preserve the color on our nails, but it is a known carcinogen and can be so harmful that many countries have made it illegal to put into cosmetics. Other dangerous chemicals in nail polish include DBP, which can affect the reproductive system, and toluene, which can irritate the eyes, throat and lungs and even cause birth defects.