Get intensive treatment for severe, persistent dandruff with La Roche-Posay Kerium DS Intense Shampoo. This rigorous shampoo is infused with LHA (Lipo Hydroxy Acid), a patented micro-exfoliating agent that works to rapidly eliminate dandruff & regular scale cell turnover. Added anti-fungal ingredients purify the scalp & stop the production of dandruff at the source, while anti-inflammatory vitamins eliminate itching & redness for a more comfortable scalp. This hardworking shampoo is formulated at a physiological p H for optimum comfort, making it suitable for even the most irritated & sensitive scalps. The scent is fresh & clean, & the soft lather leaves the scalp feeling soothed. Hair looks & feels soft & supple, with a healthy shine & no more dandruff. Apply twice weekly for four weeks for the best result, with anti-dandruff efficacy lasting for six weeks after the treatment.