The derma roller on its own want do to much but is often used in conjunction with other treatments such as PRP, Minoxidil and so on, the theory is that it sends healing signs to the scalp and that some of the hair also starts to recored as well as increasing absorption when applying topical treatment such as Minoxidil. We do use it in our clinics when patients come in for treatments but didnt have much success with people using them at home, the compliancy rate was very low.