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 Diaboost Hair Thickener is an intensive treatment to increase hair strand thickness for fuller looking hair. Nioxin Intensive Treatment Diaboost with HTX is a cosmetic Thickening Xtrafusion Treatment, scientifically designed and tested to increase the thickness of each of your existing hair strands for fuller looking hair. With a fusion of niacinamide, panthenol and caffeine, it is proven to increase the diameter of each existing hair strand, penetrate hair and make it manageable and full-looking and strengthen hair resilience against breakage. Nioxin Diaboost is an intensive treatment to increase hair strand thickness. 30 DAY MONEY-BACK GUARANTEE *Value Data Kline & Company