And i think also different types of hair react differently to shampoos. For example. I have used the same water with different hair systems, and my own hair when I had hair lol. I used to use a shampoo on my real hair that did not frizz out my hair much. Most shampoos seemed to make my hair frizzy and unmanageable. with the system its different now. The hair does not react the same way my own hair used to. So I guess that is a consideration as well. How oily peoples hair is, how thick, wha tkind of curl etc. I honestly dont believe in miracle shampoos. they all seem like the same shit to me.