The Nioxin Hair Booster is an intensive leave-in booster that is used specifically in areas with severely thinned hair density.
Use twice a day. Work Hair Booster into the hair from the roots to the ends before using the NIOXIN Scalp Treatment. Massage with the fingertips into the areas with very thinned hair density and at the hairline.
Temporary redness may occur after application due to the high concentration of the active ingredient.