Nioxin Scalp + Hair Thickening System Kits: A Closer Look When we first heard about the Nioxin Scalp + Hair Thickening System Kits, we were intrigued by claims of boosting density with niacinamide and biotin, suitable for natural, colored, and damaged hair. After a month of consistent use, the results surprised us—not just in appearance but in how our scalp felt. The lightweight formula didn’t irritate, and the gradual application approach seemed to stimulate growth without overwhelm. While we noticed subtle changes in hair thickness, the most striking difference was ours—how much more balanced our scalp felt. True to the packaging, the 1-month supply was sufficient to evaluate, and we’re now curious to see longer-term effects. Whether it’s a game-changer or just another option remains to be seen, but for now, we’re impressed by the potential.