The number one selling salon brand for thicker, fuller looking hair*. Nioxin is the only professional haircare brand endorsed by the Institute of Trichologists for thinning hair. Nioxin Intensive Treatment Deep Repair Hair Masque helps provide protection by strengthening the hair shaft against damage which reduces breakage. Delivers conditioning, manageability and smoothness for hair that is deeply repaired. Intense lightweight conditioning. Application: Use as needed. After shampooing, work evenly through hair. Leave on 3-5 minutes. Rinse well. *Value Data Kline & Company