You know, I have no clue. I know people use garlic to curb shedding and water is always good but I don't know what the other two ingredients would do. A pre-poo is usually thicker (like a conditioner or oil) because it's supposed to help protect your hair against shampoo, which can strip the hair of moisture. So I don't know if this would really count as a pre-poo. Either way, if you've researched the ingredients and think they'll strengthen or stimulate growth then use it and see what happens.