Several years ago I noticed that my hair was falling out, but growing back at the same time. So, my hair wasn't really thinning gradually, but it had gotten thinner and was staying that way. My mom had fairly good luck with the Nioxin system so I thought I'd try it too. Effectiveness Within a few weeks of using this system, my scalp itched a lot. My hairdresser said that it was likely due to the regrowth of my hair, which was encouraging. After two months of use there wasn't any noticeable difference in the thickness of my hair. I did notice, however, that my hair was much drier and unhealthier feeling than what it was normally. I chemically treat my hair, so am used to some damage but this was worse. I also think the color was stripped from my hair sooner than usual, despite the fact that this system is formulated for chemically-treated hair. I've heard enough success stories, so I wouldn't not recommend trying this is you have thinning hair. However, don't count on it working. Scent I did like the scent of the Nioxin products.