Klorane's Galangal Exfoliating and Treating Powder-Mask-Powder helps to effectively clean, exfoliate, and remove up to 100% persistent visible flakes from the first use. Enriched with Galangal extract, a  natural and scientifically-proven active ingredient that acts 4 times faster than Zinc Pyrithione**. It immediately reduces itching***, durably rebalances oily scalps and prevents the reappearance of dandruff for up to 4 weeks*.  When in contact with water, this innovative powder with its gentle exfoliating grains transforms into a creamy lather that, once rinsed, leaves the hair soft, healthy-looking and free of flakes. Use only for one-month, 2 sachets per week in replacement of your shampoo and care. Follow up with our matching Anti-dandruff shampoo for regular use to help maintain flake-free hair. *Clinical study 29 subjects 2 applications/week for 4 weeks, follow-up after 4 weeks. **Comparative in-vitro study on leading active ingredients on the market at standard concentration doses. ***caused by dandruff