Face wash, lipstick, makeup, and nail polish often carry labels like "tested" and "clinically-proven." Cosmetics like these are big business in the US, constituting about a $60 billion market.
But how does the cosmetics industry regulate the safety of its products?
In the US, the FDA oversees cosmetics. But unlike drugs (which must get approval before they can be sold), cosmetics do not. As a result, companies that use or sell unsafe ingredients usually only get in trouble if they get caught.