This is an effective deep cleansing shampoo. With this shampoo I would really recommend that you first wash your hair with a cheaper shampoo then follow with this. I have found that on the first round of shampoo this does not lather well, so you'll end up using more than you need if you want a rich lather. So if you use a cheaper shampoo first to remove the surface dirt on your hair and scalp, and then you use this shampoo, the bottle will last a lot longer and you will get more of the scalp deep cleansing.