Strengthen and fortify your hair to help it grow longer and healthier. Redken Extreme Length Shampoo, formulated with Biotin and Redken's Length Care Complex, this shampoo strengthens hair and helps prevent breakage. Reduces breakage by up to 81% and split ends by 92%. This strengthening formula gently cleanses while targeting damage, leaving your hair feeling nourished, resilient, and primed for longer, more manageable lengths.