Hi Srividhya, Hereditary, stress and nutritional deficiencies are the foremost explanations for premature greying of the hair…. Enable the henna dry, being extremely careful not to touch it even though it sets. Will not cover with clothing and stay away from drinking water while the paste is on your skin. https://waylonesfls.bloggip.com/36647162/a-simple-key-for-organic-henna-powder-for-hair-unveiled