Bioderma Node P Shampooing NormalisantBIODERMA is a brand that respects the skin's ecosystem and preserve its health, in a lasting way. Indication: Gently cleanses. Biologically eliminates moderate dandruff (dry or oily). Keeps it from reappearing. Relieves itching. Purifies the scalp. How to use: As intense treatment (3 weeks) : 3 shampoos per week Maintenance : 1 or 2 shampoos per week Lather, lightly massaging your scalp. Rinse and repeat. Leave on for 1 minute, then rinse thoroughly.