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. inspired by a japanese haircare tradition, the izumi tonic range is formulated with rice water, known to restore damage, prevent future breakage, and reveal healthier & smoother hair. we source our rice water from hyogo, japan in an eco-friendly manner. benefits: increases hair diameter leaves hair 30x stronger* thickens hair reduces split ends up to 91%* softens & smooths adds shine