Our transformative formulas, containing the i-23 Complex®, a customized blend of proteins and conditioners, are designed to treat even the most damaged hair. Repair + Renew Collection features a rich and indulgent signature scent. We've infused these formulas with Argan Oil and Keratin to help build strength, elasticity and smoothness. Professional Treatments i-23 Complex® Repairs. Restores. Restructures.™ Salon Professional Experience Since 1928 Repairs 2 Years of Damage in 1 Use*