La Roche-Posay Kerium Anti-Dandruff Treatment Shampoo for Chronic and Heavy Dandruff is a gel shampoo that works to treat stubborn and chronic dandruff and eliminates scalp itching caused by it. The concentrated dandruff treatment shampoo formula from La Roche-Posay fights dandruff and treats severe scalp itching associated with dandruff, as well as cleanses the scalp from impurities, dirt, and dandruff residues. La Roche-Posay Kerium Anti-Dandruff Shampoo contains salicylic acid with LHA that gently exfoliates the scalp and removes the layer of dead cells. It also contains ingredients resistant to the growth of bacteria causing dandruff, such as Piroctone Olamine, which helps treat dandruff permanently within 4 weeks. La Roche-Posay Kerium Anti-Dandruff Shampoo is rich in glycerin, niacin, and some natural derivatives that moisturize the scalp and soothe itching and inflammation associated with dandruff, providing a feeling of comfort from the first use. How to use: La Roche-Posay Anti-Dandruff Treatment Shampoo for chronic and stubborn dandruff is used twice a week for 4 weeks. Apply to wet hair, gently massage, then leave on the scalp for two minutes, and rinse thoroughly with water.