Redken Extreme Length Shampoo is formulated with Biotin, Castor Oil & Redken's Length Care Complex to strengthen damaged and weak hair and promotes longer, healthier-looking hair. Extreme Length Shampoo helps prevent hair breakage to achieve your desired length. BEST FOR: • All hair types and textures • Fortifying and protecting length • Damaged hair lacking protein BENEFITS • 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 lengthen and strengthen • Gently cleanses the hair • Helps promote strong hair | Redken - Extreme Length Strengthening Biotin Shampoo - 300 ml / 10.1 fl oz