Fragrance is a word that can be deceiving. It doesn't refer just to colognes and perfumes, but to anything that gives scent, and the EWG warns it's a catch-all word that covers a lot of chemicals.
Where It's Hiding: Just about any health and beauty product you'd buy for your child, from soap to shampoo to bubble bath, could have a fragrance hiding in it. Also beware of handwipes and anything else with a "smell," and fragrance on the label.
Why You Should Avoid It: Regulations are loose, and the 3,000-plus chemicals the word "fragrance" represents can cause anything from allergic reactions to birth defects, depending on what they are.