Purifies the scalp and balances its pH, preparing it for the next Biologique Recherche hair care treatment. P50 Capillaire restores the hair’s strength and vitality with treatment starting at the root. This multi-purpose lotion gently purifies the scalp and regulates sebum secretion (Poly-Alpha-Beta-Hydroxy-Acid complex, balancing and astringent agents). It also boost hair fiber resistance (moisturizing agents). It is recommended for all hair instants and is ideal for seborrheic scalps.