What it Does Redken's Extreme Length Shampoo with biotin strengthens damaged hair and helps hair to grow longer and stronger. Extreme Length Shampoo helps prevent breakage to promote your strongest, healthiest hair. 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 to help hair grow longer and stronger. Gently cleanses the hair. Helps promote strong hair How to 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. Ingredients Aqua / Water / Eau Sodium Laureth Sulfate Sodium Chloride Cocamidopropyl Betaine Citric Acid Sodium Hydroxide Parfum / Fragrance Propylene Glycol Polyquaternium-10 Sodium Benzoate Hexylene Glycol Salicylic Acid Benzyl Benzoate Limonene Benzyl Alcohol Linalool 2-Oleamido-1,3-Octadecanediol Biotin Please be aware ingredients are subject to change periodically. It is recommended you check the product packaging prior to use for a complete ingredient list.