I agree, honeycurls, that keratin treatment do not "repair" hair. It's a temporary cosmetic fix that coats your hair cuticles for a while giving the appearance of a healthier smoother cuticle until the chemical washes out. As you said, if done enough time the chemical seems to create permanent changes on your curl pattern but not necessarily for the better. My hair, for instance, is more fragile and lifeless where it's permanently straightened. Essentially the keratin treatments "killed" parts of my hair leaving them lifeless looking and fragile.