This ultra-nourishing conditioner contains Biotin and Castor Oil to leave hair soft, shiny, and healthy. The Redken Extreme Length Conditioner 1L is ideal for those wanting to grow their hair, even while coloring or bleaching, especially those with fragile or damaged hair that is prone to breakage. Biotin helps strengthen the hair to reduce breakage and promote longer hair growth. The formula also works to prevent and minimize split ends. Key Features: Strengthening - Redken Extreme Length Conditioner 1L fortifies and protects hair to prevent breakage and split ends. Lengthening - By strengthening and preventing breakage, this conditioner actively promotes hair growth for longer, healthier hair.