As a stylist, I'm pretty well acquainted with keratin smoothing treatments. I'm certified in both Keratin Complex and Brazilian Blowout systems, but if you ask me which I'd recommend I'd tell you Keratin Complex hands down, any day. If you want to know the specific reasons why, please don't hesitate to ask because I'd be happy to tell you. Anyway, if you've shelled out the $300+ for a Keratin treatment, you're gonna want to take care of it as well as you can and get the most longevity from it as possible, right? The only real way to do that is with the Keratin Complex Shampoo and Conditioner. They're tailor-made to maintaining the integrity of the service as long as possible and are sulfate-free. They're gentle on color-treated hair as well, so no need for the Color Care version, of which I am not nearly as big a fan. If you've gotten a Keratin Treatment, these two are absolute necessities and I highly recommend picking them up at your salon or Ulta.