Kerastase Chroma Gloss vs Redken Acidic Color Gloss Treatment

Kerastase publishes its acid plainly as an ingredient: 0.7 percent lactic acid with Centella Asiatica, in a liquid that turns creamier on wet hair. Redken publishes its acidity as a system: an Acidic Shine Complex at pH 3.5 to 4.5, with up to 76 percent shinier hair and shine for up to 3 days in print. One gives a formula percentage, the other gives a pH and a result claim; both are more transparent than most of this category.

The Kerastase gloss is a rinse out step on damp hair, alternating with conditioner and mask across the week. The Redken treatment is a weekly layer: five minutes on the lengths, no rinse, conditioner applied over it, then a single rinse for both. The Redken method is more distinctive and more often done wrong once; the Kerastase method slots into any existing wash without new choreography.

Both products exist because their salon colour systems needed a home gloss. Kerastase built the Chroma Gloss inside Chroma Absolu. Redken, whose professional gloss is Shades EQ, built Acidic Color Gloss as the separate retail line, and Shades EQ itself is not catalogued here because its Amazon presence is professional and third party channels rather than a clean official home listing. A buyer loyal to a salon system will recognise their own brand logic in either bottle.