I suffer from severe skin allergies, and usually I have to switch my Shampoo every two to three weeks because it will begin to make my head itch and I will get open sores all over my scalp. Eight months ago I decided to give the EverPure system a shot and I love it!! I can use all the products without having to itch my scalp all the time. Now I don't have to look like I have head lice!!