I don't know if I have dandruff or a dry scalp or what, but I have definite flakage. I have never found something that totally got rid of it until now. I use this every other shampoo. You don't need very much- especially because it's for your scalp. It is a small bottle and it is spendy, but it's worth it. It doesn't smell strongly like other dandruff shampoos I've used.
I hardly ever take the time to write reviews, so trust me and try it!