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. If you crave thicker and fuller hair Nioxin have the solution. The Nioxin System Kit 3 for Fine Coloured Hair is a 3 step program that has been specially formulated to strengthen and thicken each individual hair strand to prevent damage and breakages. Customized for scalp and hair needs, the innovative Nioxin System has been formulated to indulge hair and scalp for thicker denser looking hair within just 4 weeks.