Skip the suds: It makes sense. Washing hair washes out color too. One way the Beauty Lab tests color fading is by repeating washing cycles, because just plain water (not to mention shampoo's surfactants) can leach dye molecules from strands, the Lab explains. "Wash colored hair every other day at most," Hill says. Switch products regularly : The Beauty Lab has found that using a color_depositing shampoo, conditioner or hair_gloss treatment once a week between dye jobs can revitalize hair color. Try Seal holders Pantene Pro_V Brunette and Highlighting Expressions Shampoo and Conditioners. Gloss it up: Like lip glosses for strands, hair glosses leave a hue_boosting hint of color and shine.
The Good Housekeeping Institute breaks down why: "Other than henna, any commercially available hair dye store_bought for home use or found in salons uses chemical actives for them to work," says Birnur Aral, Ph.D., Director of the Good Housekeeping Institute's Health, Beauty and Environmental Sciences Lab. "By and large, these chemicals are synthesized substances." Even when the packaging claims to be all_natural, organic or chemical_free which is literally impossible because everything, including organic things, are made of chemicals that could basically be an outright lie. This is because the FDA can't do anything about the use of these terms regarding cosmetics.