Formulated in a very gentle, untangling & volume-enhancing cleansing base, designed to allow easy styling, makes KLORANE Strengthening Shampoo with Quinine & B Vitamins a fortifying treatment that restores the strength & health of the hair. The Cinchona is a tree from South America traditionally used for its strengthening & revitalising properties. Researchers at KLORANE Laboratories selected an extract of red Cinchona: Cinchona calisaya Wedd. species because its bark is naturally rich in Quinine, a molecule with powerful, scientifically shown & patented stimulating properties. Hypoallergenic. Vegan.