This scientifically advanced shampoo is specifically formulated for dry scalps prone to dandruff. It succeeds in banishing up to 100% of dandruff flakes from the first wash while providing 6 weeks of anti-dandruff protection. Vichy Dercos Anti-Dandruff Daily Shampoo for Dry Hair is patented and contains 1% Salicylic Acid and 1% Selenium Disulfide for instant relief and efficient results. Its lightweight foam lathers to gently exfoliate the scalp, relieving dryness and reducing discomfort without drying out hair, resulting in nourished, healthier-feeling hair and scalp. For initial treatment, use Dercos three times per week for four consecutive weeks; it is gentle enough for daily use should you prefer. When entering the maintenance phase, use the product once weekly in tandem with your customary shampoo. When applying, dampen hair, then lather the shampoo and let it sit for two minutes before washing off. Take care to avoid contact with eyes and injured skin. In the event of contact, rinse thoroughly with water.