Keratin Complex Infusion Therapy Keratin Replenisher is a high-performance treatment with advanced infusion technology. Its unique, high pH formula opens the hair cuticle, allowing keratin proteins and emollients to deeply penetrate and repair hair. While blow-drying or ironing, it revitalizes strands and seals in nourishment, leaving hair smooth and healthy. For best results, use daily as a maintenance step to enhance the Keratin Complex Smoothing Therapy.