I have an oily scalp and dry color treated hair. I use this once a week on oily parts of my scalp. It really has made a big change in the quality of my scalp as in making it normal.I follow with phyto shampoo,conditioner and styling aide or treatment. The leaving on scalp for 20 minutes drives my husband crazy as he hates the scent. The scent is strong but does not stay in hair after shampoo. I don't know how but it also works on dry scalp.