What it means: A dermatologist tested the product.
What it doesn't mean: It’s approved and endorsed by a dermatologist. “The implication is that the dermatologist liked it, but you don’t know that,” says Murad.
Best for: People who don’t necessarily need a doctor’s approval.
What it means: This word implies a hair-care product will restore hair to its natural structure―before it was damaged with styling and chemical treatments.
What it doesn't mean: That you can permanently restructure hair. This is a temporary fix that will leave hair looking and feeling healthier.
Best for: Anyone who damages her hair on a regular basis with heat styling and coloring.
What it means: The product doesn’t contain mineral oil, plant oils, or lanolin, which can clog pores and irritate skin.
What it doesn't mean: That it won’t cause a reaction. Be careful that something more irritating―like menthol, eucalyptus, or camphor―hasn’t been substituted to help the product glide on easily.
Best for: People with oily skin who don't want to look shiny by lunchtime.
What it means: Generally found on makeup packaging, it refers to the product’s staying power.
What it doesn't mean: Waterproof. “Long wearing” means it lasts longer under normal circumstances but still may not survive swimming or crying.
Best for: Times when you don’t want to touch up your makeup.