Redken Leave In Conditioner REDKEN Conditioner, Biotin & Castor Seed Oil, For Longer, Stronger Hair Conditioner For Hair Growth And Strength Deeply nourishing formula Features Redken's Strength Complex which strengthens and fortifies hair. Biotin and Castor Oil: Redken Extreme Length Conditioner is a strengthening conditioner formulated with biotin and castor oil to help strengthen damaged hair so it can grow longer | Less Breakage, Longer Hair: Helps you achieve your maximum hair length, up to 6 inches of growth in one year MEET THE EXTREME HEROES Redken Extreme Length Shampoo 300ml & Conditioner 300ml Duo | Gorgeous Shop Did the formula change in the new Extreme Length? No, this is the same formula upgraded to new packaging. What is the main ingredient in Extreme Length? All Extreme Length products are infused with biotin as part of its Length Care Complex for longer, stronger hair. Thickening Conditioner with Biotin & Castor Oil From the manufacturer DISCOVER EXTREME Discover the range The Extreme haircare collection products address every type of hair damage & breakage. This haircare system features Redken's Length Care Complex made with Biotin and Soy Protein.