I had a Lisse Keratin treatment because my hair is dry and very frizzy in humidity, so I purchased this hoping it would prolong the effects of the treatment, and indeed the treatment lasted for a full 5 months. My hair dresser said that using any NON sulfate shampoo was OK to use with keratin treatments, so the treatment may have lasted simply because this shampoo has no sulfates. However, I do like the smell, and it lathers quite nicely so that I only have to do one lather.