Redken Extreme Length Shampoo - 1L Redken Extreme Length Shampoo with Biotin & Redken's Length Care Complex helps strengthen damaged hair to grow longer and stronger. Extreme Length Shampoo helps hair growth by preventing breakage. 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 and Redken Length Care Complex to help hair grow longer and stronger Gently cleanses the hair Helps promote strong hair Use Apply to wet hair, lather and rinse. Use as a complete system with Extreme Length Conditioner with Biotin and Extreme Length Leave-In Treatment.