- Leave in intensive treatment for Color-Treated Hair. Reconditions and rejuvenates the hair and scalp with LifeXtend Complex. Thickening technology adds weightless volume. ColorKeeper extends the longevity of color. LifeXtend Complex with Saw Palmetto: Hydrates and nourishes while strengthening and fortifying for thicker, fuller looking hair. Plankton Extract: Hydrates and Nourishes the hair and scalp. ColorKeeper: Extends longevity of hair color. Apply evenly to scalp and hair. Do not rinse. May cause a temporary redness.