Acidic Color Gloss Sulfate-Free Shampoo is a low-pH cleanser from Redken formulated to extend color vibrancy and add shine on color-treated or glossed hair, positioned as a color-care shampoo rather than an everyday clarifying one.
Instead of the sulfates (like sodium laureth sulfate) found in most shampoos, it cleanses with sodium C14-16 olefin sulfonate and cocamidopropyl betaine — gentler surfactants that still lather and clean but are less likely to strip a fresh color or gloss service. Redken's testing behind the product ties it to color vibrancy for up to 32 washes and up to 76% more shine, both measured as part of the two-step system with the matching conditioner rather than the shampoo alone. Amino acids (arginine, serine, glutamic acid), soybean oil and vitamin E are the ingredients Redken calls out for conditioning and shine; salicylic acid and citric acid help hold the formula at its acidic pH.
It's a straightforward wash-and-rinse shampoo meant for regular at-home use — no developer, professional mixing or in-salon application involved.
- Vegan, sulfate-free formula
- Best paired with Acidic Color Gloss Conditioner for the tested color-retention results
