Professional Purify Shampeeling P4 is recommended for hair that suffers from persistent dandruff that is difficult to remove. This shampoo works to soothe the scalp to leave it flake and irritation free. Ideal to soothe your skin and reduce irritation, The formula, with Derma pure Complex, combats dandruff in a sustainable way and transforms the scalp environment so as to guarantee lasting protection from dandruff with regular use. How To Use : Use it instead of shampoo 3 times a week a total of 4 weeks. After that continue with Purify Shampoo. It regulates the skin to fight dandruff. Gives deep and lasting protection against dandruff. It makes the hair soft to the touch, full of energy.