Its sulfate-free shampoo purifies scalp and leaves hair 2X more hydrated* with a smooth, high-shine finish. This purifying, yet gentle shampoo is formulated with Pyrithione Zinc, a powerful active ingredient to help eliminate the symptoms of dandruff. Dermatologist tested for safety. HOW TO USE: Apply to wet hair, massage and rinse. In case of contact with eyes, rinse them immediately and thoroughly. For best results, use at least twice a week or as directed by a doctor. Follow with Fondant Apaisant Essentiel Hydrating Conditioner or Revitalisant Essentiel Hydrating Hair Mask. Follow with Serum Nuit Antipelliculaire Antidandruff Night Serum.