Selerex Dandruff Shampoo is a medical-grade anti-dandruff treatment containing Selenium Sulfide as the active ingredient. This 200ml shampoo is specifically formulated to target and control dandruff at its source. This is a medicated shampoo product that contains Selenium Sulfide, which works by targeting the underlying cause of dandruff. The pure medical grade formula is designed for treating dandruff-related scalp conditions. As this is a medicated product, follow usage instructions carefully.