- Leave in intensive treatment for Non Color-Treated Hair. Creates thicker feeling hair while helping to protect and repair hair and help support healthy hair. LifeXtend Complex: Hydrates and nourishes while strengthening and fortifying for thicker, fuller looking hair. Sage Extract: Helps energize for healthy looking hair. Kelp Extract: Helps protect from damage. Sage Leaf Extract: Helps stimulate healthy hair growth. Apply daily to scalp and hair, do not rinse. May cause a temporary redness.