Hi Dsr it makes the hair thicker by growing new hair. After 2 weeks you will notice changes and then after a month should get better. You will find it works both ways. It can temporarily make your hair thick at the same time as growing new hair. So its doubly good. By the way my partner also just started this and his hairs growing way to fast and is thick. But it doesnt work on his completely bald shiny spots, which is ok as its sexy lol.