Head & Shoulders also makes a line of clinical-strength shampoos intended to fight severe dandruff and seborrheic dermatitis. The active ingredient in these products is selenium sulfide ...

He advises: "First, you need to choose the right anti-dandruff shampoo", endorsing Head and Shoulders ... "zinc pyrithion, selenium sulphide (or selenium sulfide), ketoconazole, or coal tar ...

Some dandruff shampoos, such as Selsun Blue, have selenium as the active ingredient (Head and Shoulders uses zinc). Oral selenium supplements were studied to see whether they reduced the risk of ...