Reetha Shikakai Shampoo Reetha is an excellent hair cleanser it helps to prevent dandruff and white flakes. Regular usage makes your hair shinier and softer. Shikakai as a natural herb is used for simultaneous Hair strengthening and conditioning properties. Shikakai is a very efficient way of hair cleansing rejuvenating hair growth and dandruff prevention. Regular use of Reetha Shikakai Shampoo promotes thick and lustrous hair.