La roche posay kerium extra gentle physiological shampoo 200ml physiological shampoo with la roche posay thermal spring water protects the hair even in the presence of hard water procures lightness softness and shine indications frequent use shampoo use alone or in combination with capillary treatments properties la roche posay thermal spring water is used as an active ingredient for its soothing anti irritation properties and is combined with polysorbate 21 an exclusive tol