this strengthening shampoo gently cleanses, repairs, and thickens fragile hair. formulated with rice water to strengthen and repair, izumi tonic shampoo leaves hair 30x stronger* and reduces split ends by up to 91%*. this shampoo provides a deep yet gentle cleanse while strengthening and adding nourishment to hair. it features a lightweight formula that cleanses and thickens without stripping hair of its hydration.