I just check the Kerastase website and they had the shampoo! It is called Bain Divalent, is it correct?
It had the salicylic acid as one of the ingridient. Hmmm... I used to use shampoo called T-sal following doctor recommendation for dandruff which had 5% salicylic acid. The only thing about that was my hair was soft and smooth the day I wash and then the next day my scalp got even oilier.
I stopped using it because of it.
I wonder if this new one from Kerastase would do the same to my scalp.