Hair to Dye For

For Shine Without Color

Grab a glaze that heightens sheen but doesn't alter or add color. To aid absorption and boost the effects, wrap a warm towel around your strands for 20 to 30 minutes before rinsing, suggests Mike Petrizzi, a colorist for De Berardinis Salon in New York City.

Try Rita Hazan Foaming Gloss in Ultimate Shine ($26, Sephora stores)

Make It Last

End every shower with a cold rinse. "This makes the cuticle layer lie flat, so hair is more reflective," Petrizzi says. "And skip one shampoo a week to preserve luster."