I swim, have hard water and highlight my hair. Basically, it was a huge mess. But now I do a weekly treatment of either the Hard Water or Blondes packets with a Miracle Repair treatment after. My hair stays healthy and shiny and I don't have any breakage. If I go longer than one week, it begins to break and dry out pretty quickly. Malibu C products have saved my hair and I will never be without them!