Specially formulated for thinning hair, Nioxin Diaboost Treatment helps to strengthen and improve the thickness of each hair strand. The Xtrafusion treatment has been scientifically designed and tested, and works on the outside of the hair from the very first use, immediately enhancing the appearance of your hair. Your hair will be left fuller and thicker, as well as being less prone to breakage and damage. Easy to use, this leave-in treatment can either be used alone or in conjunction with other Nioxin products. To use: Simple to use, just spray onto the roots evenly around the head. Comb through the hair. Use morning or evening on wet or dry, natural or coloured hair and with all usual styling products. May be used alone or as the perfect addition to your regimen.