Most shampoos contain detergents whose sole purpose is to remove dirt and oil from strands, but they also strip color molecules from the hair cuticle. For color-treated strands, you want gentler alcohol- and sulfate-free formulas. Pureology Hydrate For Dry Colour-Treated Hair ($27, pureology.com) is packed with soy, oat and wheat proteins that smooth the cuticle, giving hair a vibrant shine, and has a purple tint to counteract brassy tones. The brand’s new line, Reviving Red, is designed specifically for red or copper color-treated hair that fades at a faster rate than any other hue. Other shampoos to try: Pantene Color Preserve Shine Shampoo ($4.99, panetene.com) and Rene Furterer Radiance Enhancing Shampoo ($23, renefurtererusa.com).
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