Suitable for those prone to flakes, the Vichy Dercos Anti-Dandruff 2in1 Dermatological Conditioning Shampoo supports a clarified-looking scalp and silky-soft strands. Providing protection against flakes for up to six weeks, the formula features selenium disulphide to reduce the look and feel of dryness, while hyaluronic acid helps to hydrate the hair for a high-shine, supple finish that lasts up to 72 hours.