Redken Extreme Length Conditioner is infused with Biotin, Castor Oil and Redken's Length Care Complex to help strengthen damaged hair to grow longer and stronger. This hair conditioner helps promote hair growth by preventing breakage so your hair can grow longer. Reduce breakage by 81% when using the full system of Extreme Length Shampoo, Extreme Length Conditioner, and Extreme Length Leave-In Treatment Formulated with biotin, castor oil, and Redken Length Care Complex to help hair grow longer and stronger Provides lightweight nourishment to the hair Strengthens fragile strands and ends to promote strong, healthy hair Gently conditions the hair and adds shine