Health and Beauty

Crest Whitestrips Daily Whitening Tartar Protection Directions

Whiten your teeth at home

Smiling, which usually feels good, can also make you feel self-conscious if your teeth are less than white or your lips are lined or cracked. But a slew of new treatments and products can keep you from wanting to stifle that grin. Here are the most effective teeth whiteners and brighteners, plus tips on selecting and applying gorgeous and goof-proof shades of red lipstick — just in time for little-black-dress season.

Get whiter teeth at home
Strips, trays, toothpastes...what really works? Here, our experts reveal their favorites, along with advice on who should see a dentist before considering the DIY approach.

Why do teeth change color?
Blame time and your diet. With age, the enamel on teeth becomes thinner and more transparent, and the inner layer, called dentin, looks darker. Teeth also absorb colored liquids throughout your life, says Jeff Golub-Evans, D.D.S., a cosmetic dentist in New York City. Coffee, tea, cola, and red wine are frequent culprits, along with more tenacious tobacco stains.