Product Overview Kérastase Biotic Bain Bio-Recharge Purifying Shampoo for Combination Hair is Kérastase's first hydrating shampoo for beautifully refreshed hair. Benefits Reactivate the scalp’s natural defences with this hydrating, rebalancing formula. It gently cleanses, soothes & nourishes the lengths without weighing it down for a purely stunning finish. Key Technology Bioflorine 2.5% soothes, rebalances & reactivates the scalp’s micro flora whilst Tween cleanses & gives maximum comfort to the scalp. Glycerol soothes the scalp & Si PC nourishes the lengths of the hair without weighing it down.