I remember what my friend said to me when I first moved to LA: "well, you can say goodbye to good hair"... Although she was joking of course, there was at least some truth in what she was sayin. Water in LA is incredibly harsh and calcium buildup is something you deal with constantly. Over the years I've tried a lot of things to combat this problem but I am very glad that Kérastase developed a hair-care line designed specifically to deal with that. So, here's what I typically do: I start with CONCENTRÉ DÉCALCIFIANT ULTRA-RÉPARATEUR REPAIRING PRE-SHAMPOO TREATMENT Next, I layer BAIN DÉCALCIFIANT RÉPARATEUR REPAIRING SHAMPOO on top and follow with MASQUE FILLER RÉPARATEUR ANTI-BREAKAGE REPAIRING HAIR MASK to add hydration and visibly reduce the appearance of split ends Finally, I go in with SÉRUM FILLER FONDAMENTAL REPAIRING ANTI-FRIZZ SERUM to repel humidity and lock out frizz for smoother hair KERASTASE KERASTASEPREMIERE REIGNITEYOURINNERSTRENGTH LTKBeauty